JPS6261587A - Production of optically active (r)-hydroxymandelic acid ester intermediate - Google Patents

Production of optically active (r)-hydroxymandelic acid ester intermediate

Info

Publication number
JPS6261587A
JPS6261587A JP20221785A JP20221785A JPS6261587A JP S6261587 A JPS6261587 A JP S6261587A JP 20221785 A JP20221785 A JP 20221785A JP 20221785 A JP20221785 A JP 20221785A JP S6261587 A JPS6261587 A JP S6261587A
Authority
JP
Japan
Prior art keywords
lower alkyl
acid ester
optically active
formula
general formula
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP20221785A
Other languages
Japanese (ja)
Inventor
Takashi Inayama
隆 稲山
Hiroaki Takino
滝野 宏昭
Kunisuke Izawa
井沢 邦輔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ajinomoto Co Inc
Original Assignee
Ajinomoto Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ajinomoto Co Inc filed Critical Ajinomoto Co Inc
Priority to JP20221785A priority Critical patent/JPS6261587A/en
Publication of JPS6261587A publication Critical patent/JPS6261587A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To readily obtain the titled intermediate in high optical yield, by reacting a specific benzoylformic acid compound with a microorganism of the genus Saccharomyces. CONSTITUTION:A microorganism of the genus Saccharomyces, e.g. Saccharomyces cerevisiae, etc., is cultivated in a culture medium containing a carbon source, e.g. glucose, nitrogen source, e.g. NH4 salt, etc., at 4-8pH and 20-45 deg.C for 1-10 days to treat the resultant culture and give washed and ground microbial cells, etc. 0.1-20wt% benzyloxybenzoylformic acid ester expressed by formula I [R<1> is (un)substituted lower alkyl; R<2> is H, lower alkyl, or nitro linked to any of the 2- - 4-positions; the linking position of the compound expressed by formula II is the 3- - 4-position] and 1-50wt% above- mentioned microbial cells are added to an aqueous medium, e.g. water, and reacted at 20-45 deg.C while preventing the lowering of pH by adding CaCO3 thereto to afford the aimed optically active (R)-hydroxymandelic acid ester intermediate expressed by formula III (R<1> is the same as described above; *indicates that the asymmetric carbon atom is in R configuration).

Description

【発明の詳細な説明】 〔産業上の利用分野〕 光学活性な@)−3−または4−ヒドロキシマンデル酸
及びそのエステルはβ−ラクタム系抗生物質の合成中間
体及び修飾剤として重要な化合物である。
[Detailed Description of the Invention] [Industrial Application Field] Optically active @)-3- or 4-hydroxymandelic acid and its esters are important compounds as synthetic intermediates and modifiers for β-lactam antibiotics. be.

〔従来の技術〕[Conventional technology]

光学活性な3−1たは4−ヒドロキシマンデル酸は従来
ブルシン等の光学活性な天然の塩基を用いるラセミ体の
光学分割によシ製造されていたが、この方法では塩基の
回収及び必要としない方の光学異性体のラセミ化・再循
環が必要となる点が工業的に不利である。またベンゾイ
ルギ酸誘導体を化学的または生物化学的に不斉還元して
光学活性マンデル酸誘導体を得る方法も知られてはいる
が、ヒドロキシル基を始めとする置換基を有するベンゾ
イルギ酸誘導体に応用しようとした例はない。
Optically active 3-1 or 4-hydroxymandelic acid has conventionally been produced by optical resolution of a racemate using an optically active natural base such as brucine, but this method does not require recovery or recovery of the base. It is industrially disadvantageous that racemization and recycling of one optical isomer is required. Although a method for obtaining optically active mandelic acid derivatives by chemically or biochemically asymmetric reduction of benzoylformic acid derivatives is also known, it has been attempted to apply this method to benzoylformic acid derivatives having substituents such as hydroxyl groups. There are no examples of this happening.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

本発明の目的は、置換基を有するベンゾイルギ酸エステ
ルを原料とし、これにサツカロミセス属に属する微生物
を作用させることによシ光学活性@)−3−または光学
活性@)−4−ヒドロキシマンデル酸エステルの中間体
を高い光学収率で簡便に製造するための新規な方法を提
供することにある。
The object of the present invention is to obtain optically active @)-3- or optically active @)-4-hydroxymandelic acid ester by using benzoyl formate having a substituent as a raw material and treating it with microorganisms belonging to the genus Satucharomyces. An object of the present invention is to provide a new method for easily producing an intermediate with high optical yield.

本発明者らはかかる目的を達成すべく種々の置換基を有
するベンゾイルギ酸エステルのサツカロミセス属に属す
る微生物による還元反応を研究した結果、置換基を有す
るベンゾイルギ酸エステルもその多くがす、カロミセス
属に属する微生物より不斉還元されること、置換基がヒ
ドロキシル基である場合には他の置換基の場合と比較し
て光学収率が低いこと、及び置換基がヒドロキシル基で
ある場合にヒドロキシル基を保護することによυ光学収
率が著しく向上するという新規な事実を認め、さらにヒ
ドロキシル基の保護基を脱保護の容易なペン・ゾル基と
した場合においても前述のような光学収率が向上すると
いう効果が維持されることを見出し本発明を完成するに
至った。
In order to achieve this objective, the present inventors studied the reduction reactions of benzoyl formate having various substituents by microorganisms belonging to the genus Satucharomyces, and found that many of the benzoyl formate esters having substituents were also removed by the genus Calomyces. When the substituent is a hydroxyl group, the optical yield is lower than when using other substituents, and when the substituent is a hydroxyl group, the hydroxyl group We recognized the novel fact that the υ optical yield is significantly improved by protection, and furthermore, when the protecting group of the hydroxyl group is a pen-sol group that is easy to deprotect, the optical yield as described above is improved. The present inventors have discovered that this effect can be maintained and have completed the present invention.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は一般式(I) (式中R1は置換または未置換低級アルキル基を表わす
。R2は2,3.4位いずれかの位置に結合した水素原
子、低級アルキル基、低級アルコキシ結合位置は3また
は4位である。) で示されるベンジルオキシベンゾイルギ酸エステルにサ
ツカロミセス属に属する微生物を作用させることを特徴
とする一般式(IQ (式中R1は置換または未置換低級アルキル基を表わす
。Rは2,3.4位いずれかの位置に結合した水素原子
、低級アルキル基、低級アルコキシ結合位置は3または
4位である。本は不斉炭素がR配置であることを表わす
。) で示される光学活性@)−ヒドロキシマンデル酸エステ
ル中間体の製造法である。
The present invention is based on the general formula (I) (wherein R1 represents a substituted or unsubstituted lower alkyl group. The general formula (IQ (wherein R1 represents a substituted or unsubstituted lower alkyl group. The hydrogen atom bonded to either the 2, 3, or 4 position, the lower alkyl group, or the lower alkoxy bond position is the 3 or 4 position. This indicates that the asymmetric carbon is in the R configuration.) This is a method for producing an optically active @)-hydroxymandelic acid ester intermediate.

本発明において用いられる微生物はサツカロミセスに属
する微生物でちればどのような微生物でも良く一例を挙
げればサツカロミセス・セルピノエ; AJ−1462
9(FERM−P8205)、AJ−14630(FE
RM−P 8206 )などがある。
The microorganism used in the present invention may be any microorganism belonging to the genus Satucharomyces, and one example is Satucharomyces serpinoe; AJ-1462.
9 (FERM-P8205), AJ-14630 (FE
RM-P 8206), etc.

上記微生物を培養するための培地としては通常の炭素源
、窒素源、無機イオンを含有する通常の培地である。更
にビタミン、アミノ酸等の有機微量栄養素を添加すると
望ましい結果が得られる場合が多い。
The medium for culturing the above-mentioned microorganisms is a conventional medium containing a conventional carbon source, nitrogen source, and inorganic ions. Additionally, desirable results can often be obtained by adding organic micronutrients such as vitamins and amino acids.

炭素iトt、テは、グルコース、シュークロース等の炭
水化物、酢酸等の有機酸、アルコール類。
Carbon I, T and Te are carbohydrates such as glucose and sucrose, organic acids such as acetic acid, and alcohols.

その他が適宜使用される。窒素源としては、アンモニア
ガス、アンモニア水、アンモニウム塩、その他が用いら
れる。無機イオンとしては、マグネシウムイオン、燐酸
イオン、カリイオン、鉄イオンその他が必要に応じ適宜
使用される。
Others may be used as appropriate. As the nitrogen source, ammonia gas, aqueous ammonia, ammonium salt, and others are used. As the inorganic ions, magnesium ions, phosphate ions, potassium ions, iron ions, and others are used as appropriate.

培養は好気的条件下に、pH4ないし8、温度20ない
し45℃の適当な範囲に制御しつつ工ないし10日培養
を行えば望ましい結果が得られる。
Desired results can be obtained by culturing under aerobic conditions for 1 to 10 days while controlling the pH to 4 to 8 and the temperature to an appropriate range of 20 to 45°C.

任意の時期に一般式(I)で表わされる化合物を連結又
は回分て添加することにより培養液中に一般式(II)
で表わされる化合物を蓄積せしめてこれを採取すること
もできる。
By adding the compound represented by the general formula (I) in combination or in batches at any time, the compound represented by the general formula (II) is added to the culture solution.
It is also possible to accumulate and collect the compound represented by

菌体としては、培養終了後の培養液そのまま、培養液よ
り分離された菌体、洗浄された菌体など、いづれも使用
可能である。菌体処理物としては凍結乾燥菌体、アセト
ン乾燥画体、トルエン、界面活性剤等と接触せしめた菌
体、リゾチームで処理した菌体、超音波にさらした菌体
、機械的に摩砕した菌体等のほか、これら菌体処理物か
ら得られた、一般式(I)で表わされる化合物を一般式
(I0で表わされる化合物に変換せしめる酵素活性を有
する酵素蛋白区分、更には、これらの菌体の固定化物、
菌体処理物の不溶化物、その他いずれも使用できる。
As the bacterial cells, it is possible to use any of the culture solution as it is after completion of cultivation, the bacterial cells separated from the culture solution, and the washed bacterial cells. The bacterial cell treatments include freeze-dried bacterial cells, acetone-dried samples, bacterial cells that have been brought into contact with toluene, surfactants, etc., bacterial cells that have been treated with lysozyme, bacterial cells that have been exposed to ultrasound, and mechanically ground bacterial cells. In addition to bacterial cells, etc., enzyme protein fractions having an enzyme activity that converts the compound represented by the general formula (I) into the compound represented by the general formula (I0) obtained from these bacterial cell treatments, and furthermore, these immobilized bacterial cells,
Insolubilized products of processed bacterial cells and others can also be used.

上記により得られた菌体と一般式(I)で表わされる化
合物を作用させて、一般式(IDで表わされる化合物を
得るための水溶性媒体としては、水、・譬。
The aqueous medium for obtaining the compound represented by the general formula (ID) by allowing the bacterial cells obtained above to react with the compound represented by the general formula (I) is water.

ファーおよびエタノール、メタノール、アセトン等の有
機溶媒を含むものが使用できる。
A material containing fur and an organic solvent such as ethanol, methanol, acetone, etc. can be used.

原料、すなわち一般式(I)で示されるベンジルオキシ
ベンゾイルギ酸とサツカロミセス属に属する微生物の反
応(以下本酵母還元反応と略称する)に用いられる該水
性媒体に加える菌体濃度は1〜50重量%、好ましくは
5〜15重量%であシ、温度は20〜45℃、好ましく
は25〜35℃である。原料の添加濃度は帆1〜20重
量%、好ましくは0.5〜3重量%で行なわれる。該水
性媒体中に炭酸カルシウムを加えて−の低下を防ぎ、暫
時静置又はかくはんすることによシ、目的とする一般式
(2)の化合物を該水性媒体中に蓄積させることができ
る。
The bacterial cell concentration added to the aqueous medium used for the reaction between the raw material, i.e., benzyloxybenzoylformic acid represented by general formula (I) and a microorganism belonging to the genus Satucharomyces (hereinafter abbreviated as the present yeast reduction reaction), is 1 to 50% by weight. , preferably 5 to 15% by weight, and the temperature is 20 to 45°C, preferably 25 to 35°C. The concentration of the raw materials added is 1 to 20% by weight, preferably 0.5 to 3% by weight. The target compound of general formula (2) can be accumulated in the aqueous medium by adding calcium carbonate to the aqueous medium to prevent a decrease in - and allowing it to stand for a while or stirring.

本酵母還元反応を開始するに当り、該水性媒体中にサツ
カロミセス属に属する微生物と一般式(I)で表わされ
る原料を連続又は回分て同時に加えてもよいし、又該水
性媒体中にす、カロミセス属に属する微生物を加えたも
のに一般式(I)で表わされる原料を連続又は回分て加
えてもよい。この際一般式(I)で表わされる原料はそ
のママ加えてもよいが、固体である場合には粉砕して加
えることが望ましい。またメタノール、エタノール、ア
セトン等の水と混和し得る溶剤の溶液として加えること
もできる。
In starting the present yeast reduction reaction, the microorganism belonging to the genus Satucharomyces and the raw material represented by the general formula (I) may be added simultaneously or continuously or in batches to the aqueous medium, or The raw material represented by general formula (I) may be added continuously or in batches to the mixture containing microorganisms belonging to the genus Calomyces. At this time, the raw material represented by the general formula (I) may be added to the raw material, but if it is a solid, it is preferable to crush it and add it. It can also be added as a solution in a water-miscible solvent such as methanol, ethanol, or acetone.

本酵母還元反応終了後の生成物、すなわち一般式Ql)
で示される光学活性(R)−ヒドロキシマンデル酸エス
テル中間体の採取は、該水性媒体中からの菌体の除去と
それに続く溶剤抽出により行なわれ−る。菌体除去には
濾過、遠心分離等の常法が、また抽出溶剤には酢酸エチ
ル、ジエチルエーテル等の有機溶剤が用いられる。ただ
し、菌体除去の際に菌体を抽出溶剤で洗い、この洗浄液
も抽出有機層と合わせることが望ましい。
The product after the completion of this yeast reduction reaction, that is, the general formula Ql)
The optically active (R)-hydroxymandelic acid ester intermediate represented by is collected by removing the bacterial cells from the aqueous medium and subsequent solvent extraction. Conventional methods such as filtration and centrifugation are used to remove bacterial cells, and organic solvents such as ethyl acetate and diethyl ether are used as extraction solvents. However, when removing the bacterial cells, it is desirable to wash the bacterial cells with an extraction solvent and to combine this washing solution with the extracted organic layer.

続いて、抽出有機層を脱水剤、たとえば無水硫酸ナトリ
ウムで脱水し溶剤を留去して粗生成物を得る。この粗生
成物にはす、カロミセス属に属する微生物由来の不純物
及び実施条件によっては未反応原料カニ含まれるが、シ
リカダルカラムクロマトグラフィーまたは逆相カラムク
ロマトグラフィーによシ容易に精製することができ、一
般式Ql)で示される光学活性@)−ヒドロキシマンデ
ル酸エステル中間体が高純度で得られる。
Subsequently, the extracted organic layer is dehydrated with a dehydrating agent such as anhydrous sodium sulfate, and the solvent is distilled off to obtain a crude product. This crude product may contain impurities derived from microorganisms belonging to the genus Calomyces and unreacted raw materials depending on the implementation conditions, but it can be easily purified by silica dull column chromatography or reversed-phase column chromatography. , an optically active @)-hydroxymandelic acid ester intermediate represented by the general formula Ql) is obtained with high purity.

〔実施例〕〔Example〕

以下に実施例を示して本発明をより詳細に説明するが、
本発明は実施例のみに制約されるものではない。
The present invention will be explained in more detail with reference to Examples below.
The present invention is not limited only to the examples.

実施例1 グルコース帆5み勺、硫安0.397di 、 K)I
2PO40、I Vdi 、 K2HPO40,39/
dl、MgSO4・7H200,05g肩、FeSO4
−7H200,0019/ctt、MnSO4”4H2
00,0019/di、酵母エキス帆5g鷹、−リベプ
トンo、s gyat 、マルツエキス0.5pA、ピ
リドキシン塩酸塩10!!vdtおよび炭醸カルシウム
4 i/dl(別殺菌)(pH7,0)を5ooy容フ
ラスコに50r!il入れ、120℃で15分間殺菌し
た。
Example 1 5 min of glucose, 0.397 di of ammonium sulfate, K)I
2PO40, IVdi, K2HPO40,39/
dl, MgSO4・7H200,05g shoulder, FeSO4
-7H200,0019/ctt, MnSO4”4H2
00,0019/di, yeast extract sail 5g hawk, -ribeptone o, sgyat, malt extract 0.5pA, pyridoxine hydrochloride 10! ! vdt and charcoal-brewed calcium 4 i/dl (separately sterilized) (pH 7,0) in a 500ml flask! il and sterilized at 120°C for 15 minutes.

これに上記寒天培地で30℃にて24時間培養したす、
カロミセス・セルピジェFERM−P 8205 ヲー
白金耳接種し、30℃で24時間振盪培養した。
This was cultured on the above agar medium at 30°C for 24 hours.
Calomyces serpidae FERM-P 8205 was inoculated with a platinum loop and cultured with shaking at 30°C for 24 hours.

この培養液より菌体な遠心分離により採取し、培養液と
同量の生理食塩水で一回洗浄し、菌体を集めた。この菌
体な4−ペンノルオキシベンゾイルギ酸メチルエステル
620 m97dtを含む0.1モルシん酸緩衝液(p
T(6,0)に乾燥重量換算で79Atになるように添
加し、30℃で28時間保持反応した。その後反応液に
酢酸エチル1QQdを加え激しく振とうした後セライト
を通した減圧濾過により菌体を除去した。p液を酢酸エ
チルで3回抽出し、酢酸エチル層を無水硫酸す) IJ
ウムで脱水後溶剤を減圧下罠留去して粗生成物を得た。
Bacterial cells were collected from this culture solution by centrifugation, washed once with the same amount of physiological saline as the culture solution, and collected. A 0.1 molsinate buffer (p
It was added to T(6,0) so that the amount was 79 At in terms of dry weight, and the reaction was maintained at 30° C. for 28 hours. Thereafter, 1QQd of ethyl acetate was added to the reaction solution, the mixture was vigorously shaken, and the bacterial cells were removed by vacuum filtration through Celite. Extract the p solution three times with ethyl acetate, and remove the ethyl acetate layer with anhydrous sulfuric acid.) IJ
After dehydration over a vacuum, the solvent was distilled off under reduced pressure to obtain a crude product.

これを逆相カラムクロマトグラフィー(移動相:水−メ
タノール)で精製し白色固体350rI9を得た。この
ものは融点87〜88℃、〔α)  −−102゜(C
=0.47、メタノール)を示し、Mass 、 IR
This was purified by reverse phase column chromatography (mobile phase: water-methanol) to obtain a white solid 350rI9. This product has a melting point of 87 to 88°C, [α) −102° (C
= 0.47, methanol), Mass, IR
.

NMR、CDの各ス(クトル分析によシ(6)−4−ペ
ンシルオキシマンデル酸メチルエステルと同定され、ノ
アステレオマ−化法による分析で光学純度(光学収率)
は971Se・と決定された。収率は56チであった。
It was identified as (6)-4-pencyloxymandelic acid methyl ester by NMR and CD spectrum analysis, and its optical purity (optical yield) was determined by analysis by norastereomerization method.
was determined to be 971Se. The yield was 56 pieces.

実施例2゜ 実施例1において4−ペンシルオキシマンデル酸メチル
エステルの代シに3−ベンジルオキシマンデル酸メチル
エステルを用いる以外は実施例1と同様な操作で処理し
く但し反応時間は6時間)、精製して無色粘稠物410
J’fを得た。
Example 2 The procedure was the same as in Example 1 except that 3-benzyloxymandelic acid methyl ester was used instead of 4-pencyloxymandelic acid methyl ester in Example 1, but the reaction time was 6 hours), Purified colorless viscous substance 410
I got J'f.

このものは[α]  =−72,4°(C= 0.47
、メタノール)を示し、Mass 、 IR、NMR、
CDの各ス(クトルにより@)−3−ベンジルオキシマ
ンデル酸メチルエステルと同定され、ジアステレオマー
化法によシ光学純度(光学収率)90%・・と決定され
た。収率は68%でありた。
This one is [α] = -72,4° (C = 0.47
, methanol), Mass, IR, NMR,
It was identified as CD-3-benzyloxymandelic acid methyl ester according to the chromatography, and the optical purity (optical yield) was determined to be 90% by diastereomerization method. The yield was 68%.

参考例16 実施例1において得られた(R)−4−ベンジルオキシ
マンデル酸メチルエステル14.5I!9にメタノール
1.011117 、少量の酢酸、I々ラジウムプラ、
り10ダを加え、アルプン気流下Kl、4−シクロヘキ
サジエン90μtを加え室温で66時間かくはんした。
Reference Example 16 (R)-4-benzyloxymandelic acid methyl ester obtained in Example 1 14.5I! 9, methanol 1.011117, a small amount of acetic acid, radium plas,
10 da of water was added thereto, and 90 μt of Kl and 4-cyclohexadiene were added under a stream of alponic gas, and the mixture was stirred at room temperature for 66 hours.

触媒を除去した後逆相クロマトグラフィーによ)精製し
て白色固体9.019(融点118〜120℃)として
(へ)−4−ヒドロキシマンデル酸メチルエステルを得
た(収$93%)。ノアステレオマ−化法によシ光学純
度98チ・・と決定され、光学純度の低下は認められな
かった。
After removing the catalyst, the product was purified (by reverse phase chromatography) to give (he)-4-hydroxymandelic acid methyl ester as a white solid 9.019 (melting point 118-120°C) (yield: $93%). The optical purity was determined to be 98% by the norastereomerization method, and no decrease in optical purity was observed.

比較例 4−ヒドロキシベンゾイルギ酸メチルエステル(4−H
BFMと略す)を50ダ又は3−ヒドロキシベンゾイル
ギ酸メチルエステル(3−HBFMと略す)を60ダそ
れぞれ原料とし実施例1と同様の手順によりす、カロミ
セス・セルピジェFERM−P。8205で処理し、精
製した。4− HBF’Mを原料とした場合収率69チ
、光学収率69%e・で@)−4−ヒドロキシマンデル
酸メチルエステルを、3−HBFMを原料とした場合収
率69チ、光学収率52 % @eで(R)−3−ヒド
ロキシマンデル酸メチルエステルをそれぞれ得た。
Comparative Example 4-Hydroxybenzoylformic acid methyl ester (4-H
Calomyces serpidae FERM-P was prepared using the same procedure as in Example 1 using 50 Da of 3-hydroxybenzoylformate methyl ester (abbreviated as 3-HBFM) or 60 Da of 3-hydroxybenzoylformate methyl ester (abbreviated as 3-HBFM). 8205 and purified. When using 4-HBF'M as a raw material, the yield was 69 cm, and the optical yield was 69%. (R)-3-Hydroxymandelic acid methyl ester was obtained at a yield of 52% @e.

しかし本比較例においては本発明に比較し光学収率が低
く実用性に乏しいことが判る。
However, it can be seen that this comparative example has a lower optical yield than that of the present invention and is less practical.

〔発明の効果〕〔Effect of the invention〕

本発明によシ簡便に高い光学収率で光学活性@)−ヒド
ロキシマンデル酸エステル中間体を得ることができる。
According to the present invention, an optically active @)-hydroxymandelic acid ester intermediate can be easily obtained with high optical yield.

本発明において原料となるベンジルオキシベンゾイルギ
酸エステルは、ヒドロキシル基またはそれと同等な置換
基を有するハロベンゼンのダブルカル?ニル化反応を利
用して容易に得ることができ、−志木発明により得られ
る高い光学純度の@)−ヒドロキシマンデル酸エステル
中間体は、接触水素添加等の常法によシ容易に光学純度
を損ねることなく@)−ヒドロキシマンデル酸エステル
に導くことができる。従って本発明は光学活性@)−ヒ
ドロキシマンデル酸エステルの製造を容易ならしめるも
のである。
The benzyloxybenzoyl formate used as a raw material in the present invention is a double carboxyl compound of halobenzene having a hydroxyl group or an equivalent substituent. The -hydroxymandelic acid ester intermediate, which can be easily obtained using a nylation reaction and has a high optical purity obtained by the Shiki invention, can be easily obtained in optical purity by a conventional method such as catalytic hydrogenation. It can lead to @)-hydroxymandelic acid ester without damage. Therefore, the present invention facilitates the production of optically active @)-hydroxymandelic acid esters.

Claims (1)

【特許請求の範囲】 一般式( I ) ▲数式、化学式、表等があります▼( I ) (式中R^1は置換または未置換低級アルキル基を表わ
す。R^2は2、3、4位いずれかの位置に結合した水
素原子、低級アルキル基、低級アルコキシ基またはニト
ロ基を表わす。又▲数式、化学式、表等があります▼の 結合位置は3または4位である。) で示されるベンジルオキシベンゾイルギ酸エステルにサ
ッカロミセス属に属する微生物を作用させることを特徴
とする一般式(II) ▲数式、化学式、表等があります▼(II) (式中R^1は置換または未置換低級アルキル基を表わ
す。R^2は2、3、4位いずれかの位置に結合した水
素原子、低級アルキル基、低級アルコキシ基またはニト
ロ基を表わす。又▲数式、化学式、表等があります▼の
結 合位置は3または4位である。*は不斉炭素がR配置で
あることを表わす。) で示される光学活性(R)−ヒドロキシマンデル酸エス
テル中間体の製造法。
[Claims] General formula (I) ▲Mathematical formulas, chemical formulas, tables, etc.▼(I) (In the formula, R^1 represents a substituted or unsubstituted lower alkyl group. R^2 is 2, 3, 4 Represents a hydrogen atom, lower alkyl group, lower alkoxy group, or nitro group bonded to any position.Also, ▲There are mathematical formulas, chemical formulas, tables, etc.The bond position of ▼ is the 3rd or 4th position.) General formula (II) characterized by the action of a microorganism belonging to the genus Saccharomyces on benzyloxybenzoyl formate ▲There are mathematical formulas, chemical formulas, tables, etc.▼(II) (In the formula, R^1 is substituted or unsubstituted lower alkyl Represents a group.R^2 represents a hydrogen atom, lower alkyl group, lower alkoxy group, or nitro group bonded to any of the 2, 3, or 4 positions.Also, there are ▲numeric formulas, chemical formulas, tables, etc.▼ bonds (The position is the 3rd or 4th position. * indicates that the asymmetric carbon is in the R configuration.) A method for producing an optically active (R)-hydroxymandelic acid ester intermediate represented by:
JP20221785A 1985-09-12 1985-09-12 Production of optically active (r)-hydroxymandelic acid ester intermediate Pending JPS6261587A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20221785A JPS6261587A (en) 1985-09-12 1985-09-12 Production of optically active (r)-hydroxymandelic acid ester intermediate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20221785A JPS6261587A (en) 1985-09-12 1985-09-12 Production of optically active (r)-hydroxymandelic acid ester intermediate

Publications (1)

Publication Number Publication Date
JPS6261587A true JPS6261587A (en) 1987-03-18

Family

ID=16453896

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20221785A Pending JPS6261587A (en) 1985-09-12 1985-09-12 Production of optically active (r)-hydroxymandelic acid ester intermediate

Country Status (1)

Country Link
JP (1) JPS6261587A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2774341B2 (en) * 1988-02-12 1998-07-09 ダイセル化学工業株式会社 Method for producing optically active 2-hydroxy acid derivative
JP2006525331A (en) * 2003-04-30 2006-11-09 ウェルスタット セラピューティクス コーポレイション Compounds for the treatment of metabolic disorders
US7973052B2 (en) 2003-04-15 2011-07-05 Wellstat Therapeutics Corporation Compounds for the treatment of metabolic disorders

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2774341B2 (en) * 1988-02-12 1998-07-09 ダイセル化学工業株式会社 Method for producing optically active 2-hydroxy acid derivative
US7973052B2 (en) 2003-04-15 2011-07-05 Wellstat Therapeutics Corporation Compounds for the treatment of metabolic disorders
JP2006525331A (en) * 2003-04-30 2006-11-09 ウェルスタット セラピューティクス コーポレイション Compounds for the treatment of metabolic disorders
EP1617835A4 (en) * 2003-04-30 2009-11-18 Wellstat Therapeutics Corp Compounds for the treatment of metabolic disorders
US7749990B2 (en) 2003-04-30 2010-07-06 Wellstat Therapeutics Corporation Compositions for the treatment of metabolic disorders
JP4837557B2 (en) * 2003-04-30 2011-12-14 ウェルスタット セラピューティクス コーポレイション Compounds for the treatment of metabolic disorders

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