JPH06100490A - Production of optically active alpha-methylsuccinic acid - Google Patents

Production of optically active alpha-methylsuccinic acid

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Publication number
JPH06100490A
JPH06100490A JP29367292A JP29367292A JPH06100490A JP H06100490 A JPH06100490 A JP H06100490A JP 29367292 A JP29367292 A JP 29367292A JP 29367292 A JP29367292 A JP 29367292A JP H06100490 A JPH06100490 A JP H06100490A
Authority
JP
Japan
Prior art keywords
methylsuccinic acid
optically active
alpha
acid
water
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
JP29367292A
Other languages
Japanese (ja)
Inventor
Akio Mizoguchi
昭男 溝口
Masakatsu Takeda
正勝 竹田
Kensho Murata
憲昭 村田
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.)
Fuji Yakuhin Kogyo KK
Original Assignee
Fuji Yakuhin Kogyo KK
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 Fuji Yakuhin Kogyo KK filed Critical Fuji Yakuhin Kogyo KK
Priority to JP29367292A priority Critical patent/JPH06100490A/en
Publication of JPH06100490A publication Critical patent/JPH06100490A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To selectively, efficiently and industrially produce (+)-alpha-methylsuccinic acid or (-)-alpha-methylsuccinic acid by optically resolving (+ or -)-alpha-methylsuccinic acid. CONSTITUTION:This method for producing an optically active alpha-methylsuccinic acid comprises reacting (+ or -)-alpha-methylsuccinic acid with optically active threo-2- amino-1-(4-nitrophenyl)-1,3-propanediol to deposit either one diastereomer salt as a sparingly soluble crystal in good yield and decomposing this diastereomer salt to provide the optically active alpha-methylsuccinic acid.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、光学活性なα−メチル
コハク酸の製造方法に関する。光学活性なα−メチルコ
ハク酸は、不斉炭素を有する種々な天然物又は医薬品な
どの生理活性物質を合成する際の有用な中間体の一つで
あり、例えば多くの不斉中心を持つテルペンやビタミン
Eの側鎖などの合成に、極めて有用な化学物質である。
従って、光学活性なα−メチルコハク酸を製造する工業
的方法が求められている。
FIELD OF THE INVENTION The present invention relates to a method for producing optically active α-methylsuccinic acid. Optically active α-methylsuccinic acid is one of useful intermediates when synthesizing physiologically active substances such as various natural products or pharmaceuticals having an asymmetric carbon, for example, terpenes having many asymmetric centers and It is a very useful chemical substance for the synthesis of side chains such as vitamin E.
Therefore, there is a need for an industrial method for producing optically active α-methylsuccinic acid.

【0002】[0002]

【従来の技術】(±)−α−メチルコハク酸の光学分割
方法については、ほとんど研究されておらず、わずか
に、ストリキニーネで分割する方法が報告されているの
みである[Gazz.Chim.Ital.,196
8,98(11)]。
2. Description of the Prior Art Little research has been conducted on the optical resolution method of (±) -α-methylsuccinic acid, and only a slight method of resolving with strychnine has been reported [Gazz. Chim. Ital. , 196
8, 98 (11)].

【0003】しかしながら、上記の方法で得られる光学
活性なα−メチルコハク酸は、(+)−α−メチルコハ
ク酸のみであり、しかも、光学純度は77%であり、工
業的に実用的な、光学純度とはいえない。
However, the only optically active α-methylsuccinic acid obtained by the above method is (+)-α-methylsuccinic acid, and the optical purity is 77%. Not pure.

【0004】一方、光学活性なα−メチルコハク酸を不
斉合成で得る方法として、イタコン酸を原料とする、不
斉水素化触媒と高価なロジウム等の金属錯化合物の共存
下で、不斉水素添加反応を行う方法、例えば、特開昭5
4−122219,Tetrahedron Let
t.,28(17),1905−8,1984.Bul
l.Chem.Soc.Jpn.,57(8),217
1−6,1984.J.Org.Chem.,51
(5),723−7,1986.等報告されているが、
上記の方法では、原料として安価なイタコン酸を用いて
いるが、高価な不斉触媒及び高価なロジウム等の金属化
合物を使用しなければならず、さらに該不斉触媒及び該
ロジウム等の金属化合物の回収は困難であり、工業的に
実用的な方法とは言えない。
On the other hand, the optically active α-methylsuccinic acid is not used.
As a method for obtaining by simultaneous synthesis, itaconic acid is used as a raw material
Coexistence of asymmetric hydrogenation catalyst and expensive metal complex compounds such as rhodium
A method for carrying out an asymmetric hydrogenation reaction under
4-122219, Tetrahedron Let
t. ,28(17), 1905-8, 1984. Bul
l. Chem. Soc. Jpn. ,57(8), 217
1-6, 1984. J. Org. Chem. ,51
(5), 723-7, 1986. Although it has been reported,
In the above method, inexpensive itaconic acid is used as a raw material.
However, expensive asymmetric catalysts and expensive metalization of rhodium, etc.
Must be used in addition to the asymmetric catalyst and the
It is difficult to recover metal compounds such as rhodium, and industrially
Not a practical method.

【0005】従って、(+)−α−メチルコハク酸又は
(−)−α−メチルコハク酸を、選択的にかつ効率的に
製造する方法が求められており、(±)−α−メチルコ
ハク酸に光学活性なアミンを作用させ、選択的にかつ効
率よく製造することが出来れば工業的な意義は大きい。
Therefore, there is a demand for a method for selectively and efficiently producing (+)-α-methylsuccinic acid or (-)-α-methylsuccinic acid. It is of great industrial significance if an active amine is allowed to act to selectively and efficiently produce the amine.

【0006】[0006]

【発明が解決しようとする課題】本発明の目的は、ジア
ステレオマー法により、(+)−α−メチルコハク酸又
は(−)−α−メチルコハク酸を選択的にかつ効率よ
く、製造する方法を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing (+)-α-methylsuccinic acid or (-)-α-methylsuccinic acid selectively and efficiently by the diastereomeric method. To provide.

【0007】本発明者らは、前記した従来技術の有する
問題点を解決するために、鋭意研究した結果、(±)−
α−メチルコハク酸に光学分割剤として特定の光学活性
なアミンを作用させることにより、(+)−α−メチル
コハク酸又は(−)−α−メチルコハク酸を選択的かつ
効率よく光学分割できることを見いだした。
The inventors of the present invention have conducted extensive studies in order to solve the above-mentioned problems of the prior art, and as a result, (±)-
It was found that (+)-α-methylsuccinic acid or (-)-α-methylsuccinic acid can be selectively and efficiently optically resolved by allowing a specific optically active amine to act on α-methylsuccinic acid as an optical resolution agent. .

【0008】すなわち、適切な溶媒中で(±)−α−メ
チルコハク酸に光学活性なスレオ−2−アミノ−1−
(4−ニトロフェニル)−1,3−プロパンジオールを
作用させると、一方のジアステレオマー塩を難溶性の結
晶として、収率よく析出させることができることを見い
だした。本発明は、これらの知見に基づいて完成するに
至ったものである。
That is, optically active threo-2-amino-1-in the form of (±) -α-methylsuccinic acid in a suitable solvent.
It was found that when one of (4-nitrophenyl) -1,3-propanediol is allowed to act, one of the diastereomeric salts can be precipitated as a poorly soluble crystal in good yield. The present invention has been completed based on these findings.

【0009】[0009]

【課題を解決するための手段】かくして、本発明によれ
ば、(±)−α−メチルコハク酸に光学活性なスレオ−
2−アミノ−1−(4−ニトロフェニル)−1,3−プ
ロパンジオールを、作用させることを特徴とする(±)
−α−メチルコハク酸の光学分割方法が提供される。
Thus, according to the present invention, threo- that is optically active in (±) -α-methylsuccinic acid is used.
2-amino-1- (4-nitrophenyl) -1,3-propanediol is allowed to act (±)
An optical resolution method of -α-methylsuccinic acid is provided.

【0010】以下本発明について詳述する。本発明にお
いて、出発原料として用いる(±)−α−メチルコハク
酸は公知であり、安価で得ることができる。
The present invention will be described in detail below. In the present invention, (±) -α-methylsuccinic acid used as a starting material is known and can be obtained at low cost.

【0011】(±)−α−メチルコハク酸と、光学活性
なスレオ−2−アミノ−1−(4−ニトロフェニル)−
1,3−プロパンジオールを造塩させるには、適切な溶
媒中で、これらの化合物を加熱溶解させればよい。溶媒
としては適切な溶媒を選べばよいが、例えば、ジイソプ
ロピルエーテル、ジエチルエーテル、テトラヒドロフラ
ン、アニソールなどのエーテル類;ヘキサン、ペンタ
ン、シクロヘキサンなどの飽和炭化水素類;トルエン、
ベンゼン、キシレンなどの芳香族炭化水素類;メタノー
ル、エタノール、2−プロパノールなどのアルコール
類;アセトン、メチルエチルケトン、メチルイソブチル
ケトンなどのケトン類;酢酸エチル、酢酸メチルなどの
エステル類及び水などを、挙げることができる。これら
の溶媒は、単独で使用するか、あるいは2種以上混合し
て使用してもよい。
(±) -α-Methylsuccinic acid and optically active threo-2-amino-1- (4-nitrophenyl)-
In order to salt 1,3-propanediol, these compounds may be heated and dissolved in a suitable solvent. As the solvent, an appropriate solvent may be selected; for example, ethers such as diisopropyl ether, diethyl ether, tetrahydrofuran and anisole; saturated hydrocarbons such as hexane, pentane and cyclohexane; toluene,
Aromatic hydrocarbons such as benzene and xylene; alcohols such as methanol, ethanol and 2-propanol; ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone; esters such as ethyl acetate and methyl acetate, and water. be able to. These solvents may be used alone or in combination of two or more.

【0012】分割剤である光学活性なスレオ−2−アミ
ノ−1−(4−ニトロフェニル)−1,3−プロパンジ
オールの使用割合は特に限定されないが、出発原料の
(±)−α−メチルコハク酸に対して通常1.0〜2.
2倍(モル比)の範囲が分割効率の観点から好ましい。
The ratio of the optically active threo-2-amino-1- (4-nitrophenyl) -1,3-propanediol, which is the resolving agent, is not particularly limited, but the starting material (±) -α-methylsuccinic acid is used. Usually 1.0 to 2.
The range of 2 times (molar ratio) is preferable from the viewpoint of division efficiency.

【0013】難溶性ジアステレオマー塩を溶媒から析出
させるには、各溶媒の凝固点から沸点までの間の温度、
好ましくは室温から沸点までの温度範囲で、出発原料の
(±)−α−メチルコハク酸と光学活性なスレオ−2−
アミノ−1−(4−ニトロフェニル)−1,3−プロパ
ンジオールを作用させて、ジアステレオマー塩を形成さ
せた後に、冷却または濃縮する事により析出させればよ
い。
To precipitate the sparingly soluble diastereomeric salt from the solvent, the temperature between the freezing point and the boiling point of each solvent,
Preferably in the temperature range from room temperature to the boiling point, the starting material (±) -α-methylsuccinic acid and optically active threo-2-
Amino-1- (4-nitrophenyl) -1,3-propanediol may be allowed to act to form a diastereomeric salt, which may then be cooled or concentrated for precipitation.

【0014】通常は、出発原料と分割剤を比較的少量の
溶媒に加熱溶解させ、しかる後に得られた溶液を徐冷す
ることにより、難溶性のジアステレオマー塩を析出させ
る方法が好ましい。
Usually, a method is preferred in which the starting material and the resolving agent are heated and dissolved in a relatively small amount of solvent, and then the resulting solution is gradually cooled to precipitate a hardly soluble diastereomer salt.

【0015】かくして、析出した難溶性のジアステレオ
マー塩は、濾過、遠心分離などの通常の固液分離法によ
り容易に分離することができる。また、分離した難溶性
ジアステレオマー塩の結晶は、必要に応じて再結晶する
ことにより、その純度を高めることができる。
Thus, the precipitated sparingly soluble diastereomeric salt can be easily separated by a usual solid-liquid separation method such as filtration or centrifugation. Further, the separated crystal of the hardly soluble diastereomer salt can be recrystallized as necessary to increase the purity thereof.

【0016】かくして、得られた難溶性ジアステレオマ
ー塩は、α−メチルコハク酸1分子と光学活性なスレオ
−2−アミノ−1−(4−ニトロフェニル)−1,3−
プロパンジオール2分子のジアステレオマー塩である。
ジアステレオマー塩を分解するには、公知の如何なる方
法によってもよいが、通常は水酸化ナトリウムや水酸化
カリウムなどの水溶性塩基の水溶液で処理する。遊離し
た光学活性なアミンは、結晶で析出したときは濾別した
後、濾液を鉱酸例えば塩酸等で酸性化し、ジエチルエー
テル等の有機溶媒で抽出し、この有機溶媒層から高純度
の光学活性α−メチルコハク酸を得ることができる。一
方、遊離した光学活性なアミンが結晶化しないでオイル
のときは、ジエチルエーテル、ベンゼン等の有機溶媒で
抽出分離した後、水層を鉱酸例えば塩酸等で酸性化し、
ジエチルエーテル等の有機溶媒で抽出し、この有機溶媒
層から高純度の光学活性α−メチルコハク酸を得ること
ができる。
The thus obtained sparingly soluble diastereomeric salt is composed of one molecule of α-methylsuccinic acid and optically active threo-2-amino-1- (4-nitrophenyl) -1,3-.
It is a diastereomeric salt of two molecules of propanediol.
The diastereomeric salt may be decomposed by any known method, but it is usually treated with an aqueous solution of a water-soluble base such as sodium hydroxide or potassium hydroxide. The optically active amine liberated is filtered out when it precipitates as crystals, and then the filtrate is acidified with a mineral acid such as hydrochloric acid and extracted with an organic solvent such as diethyl ether. It is possible to obtain α-methylsuccinic acid. On the other hand, when the liberated optically active amine is an oil without crystallization, it is extracted and separated with an organic solvent such as diethyl ether or benzene, and then the aqueous layer is acidified with a mineral acid such as hydrochloric acid,
By extracting with an organic solvent such as diethyl ether, highly pure optically active α-methylsuccinic acid can be obtained from this organic solvent layer.

【0017】また、ジアステレオマー塩を水に溶解した
後、陽イオン交換樹脂に通し、溶出液を減圧濃縮又は、
凍結乾燥する方法によっても目的物が得られる。
Further, after dissolving the diastereomeric salt in water, it is passed through a cation exchange resin and the eluate is concentrated under reduced pressure or
The desired product can also be obtained by a freeze-drying method.

【0018】[0018]

【発明の効果】本発明の方法は、従来の光学活性α−メ
チルコハク酸の製造法と比較し、得られるα−メチルコ
ハク酸の光学純度及び収率の両面において遙かに優れ、
しかも操作が容易であることから特に工業的製造法とし
て有用である。
INDUSTRIAL APPLICABILITY The method of the present invention is far superior in both optical purity and yield of the obtained α-methylsuccinic acid, as compared with the conventional method for producing optically active α-methylsuccinic acid,
Moreover, since it is easy to operate, it is particularly useful as an industrial production method.

【0019】[0019]

【実施例】以下実施例により本発明を具体的に説明する
が、本発明はこれにより限定されるものではない。
The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto.

【0020】光学純度は化学便覧基礎編1(平成3年
版)374頁メチルコハク酸の比旋光度を基準に決定し
た。
The optical purity was determined on the basis of the specific optical rotation of methyl succinic acid, page 374, Chemical Handbook, Basic Edition 1 (1992 edition).

【0021】[0021]

【実施例1】(±)−α−メチルコハク酸2.64g
(20ミリモル)に、D−(−)−スレオ−2−アミノ
−1−(4−ニトロフェニル)−1,3−プロパンジオ
ール8.49g(40ミリモル)、エタノール40m
l,水10mlを加え、1時間加熱還流後、室温まで徐
冷する。析出した難溶性ジアステレオマー塩の結晶を濾
取して6.72gを得た。収率61%
Example 1 (±) -α-methylsuccinic acid 2.64 g
(20 mmol), D-(-)-threo-2-amino-1- (4-nitrophenyl) -1,3-propanediol 8.49 g (40 mmol), ethanol 40 m
l, 10 ml of water are added, the mixture is heated under reflux for 1 hour, and then gradually cooled to room temperature. The precipitated crystal of the slightly soluble diastereomer salt was collected by filtration to obtain 6.72 g. 61% yield

【0022】この塩6gにエタノール21ml,水6m
lを加え再結晶して、ジアステレオマー精製塩4.96
gを得た。収率83%、m.p.141〜142.5
℃、[α]−20.5゜(c=2,水,20℃)
To 6 g of this salt, 21 ml of ethanol and 6 m of water
1 and recrystallized to give the purified diastereomer salt 4.96.
g was obtained. Yield 83%, m.p. p. 141-142.5
° C, [α] D -20.5 ° (c = 2, water, 20 ° C)

【0023】再結晶の塩1gを、水10mlに溶解し陽
イオン交換樹脂10mlに通し、アミンを吸着させ、溶
出液を凍結乾燥し、(−)−(α)−メチルコハク酸
0.21g得る。収率89%、m.p.111〜113
℃、[α]−8.0゜(c=1,水,20℃)、光学
純度 87%
1 g of the recrystallized salt was dissolved in 10 ml of water and passed through 10 ml of a cation exchange resin to adsorb amine, and the eluate was freeze-dried to obtain 0.21 g of (-)-(α) -methylsuccinic acid. Yield 89%, m.p. p. 111-113
° C, [α] D -8.0 ° (c = 1, water, 20 ° C), optical purity 87%

【0024】[0024]

【実施例2】(±)−α−メチルコハク酸6.61g
(50ミリモル)、D−(−)−スレオ−2−アミノ−
1−(4−ニトロフェニル)−1,3−プロパンジオー
ル21.22g(100ミリモル)、2−プロパノール
40ml,水10mlを加え1時間加熱還流後、5℃ま
で徐冷する。析出した難溶性ジアステレオマー塩の結晶
を濾取して10.63gを得た。収率38%
Example 2 (±) -α-methylsuccinic acid 6.61 g
(50 mmol), D-(-)-threo-2-amino-
21.22 g (100 mmol) of 1- (4-nitrophenyl) -1,3-propanediol, 40 ml of 2-propanol and 10 ml of water were added, and the mixture was heated under reflux for 1 hour and gradually cooled to 5 ° C. The precipitated crystal of the slightly soluble diastereomer salt was collected by filtration to obtain 10.63 g. Yield 38%

【0025】この塩8gを2−プロパノール32ml,
水8mlを加え再結晶して、収率62%でジアステレオ
マー精製塩4.96gを得た。m.p.141〜14
2.5℃、 [α]−20.5゜(c=2,水,20
℃)
8 g of this salt was added to 32 ml of 2-propanol,
The crystals were recrystallized by adding 8 ml of water to obtain 4.96 g of a purified diastereomer salt with a yield of 62%. m. p. 141-14
2.5 ° C., [α] D −20.5 ° (c = 2, water, 20
℃)

【0026】再結晶の塩1gを水10mlに溶解し、陽
イオン交換樹脂10mlに通しアミンを吸着させ、溶出
液を凍結乾燥し、(−)−(α)−メチルコハク酸0.
21g得た。収率89%、m.p.115〜115.5
℃、[α]−9.0゜(c=1,水,20℃)、光学
純度98%
1 g of the recrystallized salt was dissolved in 10 ml of water, passed through 10 ml of a cation exchange resin to adsorb the amine, and the eluate was lyophilized to give (-)-(α) -methylsuccinic acid.
21 g was obtained. Yield 89%, m.p. p. 115-115.5
° C, [α] D -9.0 ° (c = 1, water, 20 ° C), optical purity 98%

【0027】[0027]

【実施例3】(±)−α−メチルコハク酸13.2g
(100ミリモル)に、D−(−)−スレオ−2−アミ
ノ−1−(4−ニトロフェニル)−1,3−プロパンジ
オール21.2g(100ミリモル)、メタノール50
mlを加え、60〜65℃で1時間加熱後、室温まで徐
冷する。析出した難溶性ジアステレオマー塩の結晶を濾
取して11.8gを得た。m.p.139〜141℃、
[α]−21.4°(c=2,水,20℃)
Example 3 13.2 g of (±) -α-methylsuccinic acid
(100 mmol), 21.2 g (100 mmol) of D-(-)-threo-2-amino-1- (4-nitrophenyl) -1,3-propanediol, and 50 of methanol.
After adding ml, the mixture is heated at 60 to 65 ° C. for 1 hour and then gradually cooled to room temperature. The precipitated crystal of the slightly soluble diastereomer salt was collected by filtration to obtain 11.8 g. m. p. 139-141 ° C,
[Α] D −21.4 ° (c = 2, water, 20 ° C.)

【0028】この塩6.52gに、メタノール200m
lを加え再結晶し、収率75%でジアステレオマー精製
塩4.9gを得た。m.p.141〜142.5℃、
[α]−20.5°(c=2,水,20℃)
To 6.52 g of this salt was added 200 m of methanol.
l was added and recrystallized to obtain 4.9 g of purified diastereomer salt with a yield of 75%. m. p. 141 ~ 142.5 ℃,
[Α] D −20.5 ° (c = 2, water, 20 ° C.)

【0029】ジアステレオマー精製塩1gを、水10m
lに溶解し、10N−NaOH水溶液を加え、pH12
に調整する。析出したD−(−)−スレオ−2−アミノ
−1−(4−ニトロフェニル)−1,3−プロパンジオ
ールを濾別した後、濾液を濃塩酸で酸性化し、ジエチル
エーテルで3回抽出する。ジエチルエーテル層を無水硫
酸マグネシウムで乾燥後、減圧下溶媒を留去して、光学
活性な(−)−α−メチルコハク酸を0.23g得た。
収率97%,m.p.111〜112℃,[α]
8.1゜(c=1,水,20℃),光学純度88%
1 g of the purified diastereomer salt was added to 10 m of water.
l, dissolve in 10N-NaOH aqueous solution, add pH 12
Adjust to. The precipitated D-(-)-threo-2-amino-1- (4-nitrophenyl) -1,3-propanediol was filtered off, the filtrate was acidified with concentrated hydrochloric acid and extracted 3 times with diethyl ether. . The diethyl ether layer was dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure to give 0.23 g of optically active (−)-α-methylsuccinic acid.
Yield 97%, m.p. p. 111-112 ° C, [α] D
8.1 ° (c = 1, water, 20 ° C), optical purity 88%

【0030】[0030]

【実施例4】(±)−α−メチルコハク酸10g(7
5.7ミリモル)に、L−(+)−スレオ−2−アミノ
−1−(4−ニトロフェニル)−1,3−プロパンジオ
ール32.1g(151ミリモル)、メタノール168
ml、水42mlを加え、60〜65℃で、1時間加熱
後室温まで徐冷する。析出した難溶性ジアステレオマー
塩の結晶を濾取して、21gを得た。収率50%、m.
p.139〜140℃、[α]−21.2゜(c=
2,水,20℃)
Example 4 (±) -α-methylsuccinic acid 10 g (7
5.7 mmol), L-(+)-threo-2-amino-1- (4-nitrophenyl) -1,3-propanediol 32.1 g (151 mmol), methanol 168
ml, 42 ml of water are added, and the mixture is heated at 60 to 65 ° C. for 1 hour and then gradually cooled to room temperature. The precipitated crystal of the slightly soluble diastereomeric salt was collected by filtration to obtain 21 g. Yield 50%, m.p.
p. 139 to 140 ° C., [α] D −21.2 ° (c =
2, water, 20 ℃)

【0031】この塩20gにメタノール22ml、水2
2mlを加え再結晶して、収率88%でジアステレオマ
ー精製塩17.5gを得た。m.p.141〜142
℃、[α]−21.5°(c=2,水,20℃)
To 20 g of this salt, 22 ml of methanol and 2 ml of water
After recrystallization by adding 2 ml, 17.5 g of purified diastereomer salt was obtained with a yield of 88%. m. p. 141-142
° C, [α] D -21.5 ° (c = 2, water, 20 ° C)

【0032】再結晶の塩1gを水10mlに溶解し、陽
イオン交換樹脂10mlに通しアミンを吸着させ、溶出
液を凍結乾燥し、(+)−(α)−メチルコハク酸0.
21g得た。収率89%、m.p.115〜115.5
℃、[α]+8.1°(c=1,水,20℃)、光学
純度88%
1 g of the recrystallized salt was dissolved in 10 ml of water, passed through 10 ml of a cation exchange resin to adsorb the amine, and the eluate was freeze-dried to give (+)-(α) -methylsuccinic acid.
21 g was obtained. Yield 89%, m.p. p. 115-115.5
° C, [α] D + 8.1 ° (c = 1, water, 20 ° C), optical purity 88%

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 (±)−α−メチルコハク酸に、光学活
性なスレオ−2−アミノ−1−(4−ニトロフェニル)
−1,3−プロパンジオールを作用させ、生成したジア
ステレオマー塩を、その溶解度差を利用して分離し、光
学活性なα−メチルコハク酸1分子と、光学活性スレオ
−2−アミノ−1−(4−ニトロフェニル)−1,3−
プロパンジオール2分子のジアステレオマー塩を得、こ
のジアステレオマー塩を分解し、光学活性なα−メチル
コハク酸を得ることを特徴とする、光学活性α−メチル
コハク酸の製造方法。
1. An optically active threo-2-amino-1- (4-nitrophenyl) compound containing (±) -α-methylsuccinic acid.
Diastereomeric salt produced by the action of -1,3-propanediol is separated by utilizing the solubility difference, and one molecule of optically active α-methylsuccinic acid and optically active threo-2-amino-1- (4-nitrophenyl) -1,3-
A process for producing an optically active α-methylsuccinic acid, which comprises obtaining a diastereomeric salt of two molecules of propanediol and decomposing the diastereomeric salt to obtain an optically active α-methylsuccinic acid.
JP29367292A 1992-09-17 1992-09-17 Production of optically active alpha-methylsuccinic acid Pending JPH06100490A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29367292A JPH06100490A (en) 1992-09-17 1992-09-17 Production of optically active alpha-methylsuccinic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29367292A JPH06100490A (en) 1992-09-17 1992-09-17 Production of optically active alpha-methylsuccinic acid

Publications (1)

Publication Number Publication Date
JPH06100490A true JPH06100490A (en) 1994-04-12

Family

ID=17797748

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29367292A Pending JPH06100490A (en) 1992-09-17 1992-09-17 Production of optically active alpha-methylsuccinic acid

Country Status (1)

Country Link
JP (1) JPH06100490A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000076995A1 (en) * 1999-06-14 2000-12-21 Mitsubishi Pharma Corporation Process for the preparation of (-)-1,4-benzothiazine-2-acetic acid derivatives

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000076995A1 (en) * 1999-06-14 2000-12-21 Mitsubishi Pharma Corporation Process for the preparation of (-)-1,4-benzothiazine-2-acetic acid derivatives

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