JPS6233139A - Production of 2-aminobenzyl alcohol - Google Patents
Production of 2-aminobenzyl alcoholInfo
- Publication number
- JPS6233139A JPS6233139A JP60171026A JP17102685A JPS6233139A JP S6233139 A JPS6233139 A JP S6233139A JP 60171026 A JP60171026 A JP 60171026A JP 17102685 A JP17102685 A JP 17102685A JP S6233139 A JPS6233139 A JP S6233139A
- Authority
- JP
- Japan
- Prior art keywords
- formula
- zinc chloride
- added
- mol
- anthranilic acid
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は一般式(T)
C式中R2及びR3は水素原子又は低級アルキル基を意
味する)で表わされる2−アミノベンジルアルコール類
の新規な製造法に関する。さらに詳しく言えば1本発明
は一般式(U)
(式中、R,、R,及びR8は水素原子又は低級アルキ
ル基を意味する)で表わされるアントラニル酸誘導体を
塩化亜鉛存在下水素化ホウ素ナトリウムを用いて還元さ
せることを特徴とする前記ム般式(1)で表わされる2
−アミノベンジルアルコール類の製造法を提供するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel method for producing 2-aminobenzyl alcohols represented by the general formula (T)C in which R2 and R3 represent a hydrogen atom or a lower alkyl group. More specifically, 1 the present invention provides an anthranilic acid derivative represented by the general formula (U) (wherein R, , R, and R8 represent a hydrogen atom or a lower alkyl group) in the presence of zinc chloride with sodium borohydride. 2 represented by the general formula (1), characterized in that it is reduced using
- A method for producing aminobenzyl alcohols is provided.
本発明方法により製造される前記一般式(I)で表すさ
れる2−アミノベンジルアルコール類ハタとえば、本発
明者らが先に出願した特願昭59−182400記載の
H+−)−に+人TPアーゼ■害作用を有する新規な抗
潰瘍剤、一般式
(式中R2及びRaは水素原子又は低級アルキル基を意
味する)で表わされる2−(2−アミノベンジルスルフ
ィニル)ベンズイミダゾール訪導体の合成中間体として
有用な他、医薬・農薬などの合成中間体としても有用な
化合物である。For example, the 2-aminobenzyl alcohols represented by the general formula (I) produced by the method of the present invention include the H+-)-+ A novel anti-ulcer agent with a harmful effect on human TPase, a 2-(2-aminobenzylsulfinyl)benzimidazole derivative represented by the general formula (wherein R2 and Ra represent a hydrogen atom or a lower alkyl group). It is a compound that is useful not only as a synthetic intermediate, but also as a synthetic intermediate for pharmaceuticals, agricultural chemicals, etc.
従来この化合物の製造法としては、例えば次のような方
法が知られている。ジャーナル・オプ・・ザ・ケミカル
・ソサエティ(J 、Chem、Sac )4127−
34(1954)及び3544−5(1957)に記載
された方法ではアントラニル酸誘導体(R)をエチルエ
ーテル中水素化アルミニウムリチウムにより還元し2−
アミノベンジルアルコール類(I〕を得ている。この方
法では引火性の高いエチルエーテルを溶媒として使い、
さらに高価で危険な試薬である水素化アルミニウムリチ
ウムを用いており、工業的には全く利用することができ
ない。Conventionally, the following methods are known as methods for producing this compound. Journal of the Chemical Society (J, Chem, Sac) 4127-
34 (1954) and 3544-5 (1957), the anthranilic acid derivative (R) is reduced with lithium aluminum hydride in ethyl ether to give 2-
Aminobenzyl alcohols (I) are obtained.This method uses highly flammable ethyl ether as a solvent.
Furthermore, it uses lithium aluminum hydride, which is an expensive and dangerous reagent, and cannot be used industrially at all.
一方、水素化ホウ素ナトリウムと塩化亜鉛の組み合わせ
による還元反応は既に知られているが、カルボニル基の
還元で用いられているにすぎず(有機合成化学製会誌u
27,633−41(1981))1エステル類を還元
した報告は無い。さらにブラウン(Brown )らは
ジャーナル・オブ・ザ・アメリカ7−ケミカル・ソサエ
ティ(J、λm、 Chem、 Soc、 )2582
−2588.78.(1956)においてエステル類を
水素化ホウ素ナトリウムと塩化亜鉛で?(元しようと試
みたが全く未反応に終わっている。On the other hand, a reduction reaction using a combination of sodium borohydride and zinc chloride is already known, but it has only been used to reduce carbonyl groups (Journal of Organic Synthetic Chemistry, U.
27, 633-41 (1981)) There is no report on the reduction of 1 esters. Furthermore, Brown et al.
-2588.78. (1956), esters with sodium borohydride and zinc chloride? (I tried to get it back, but it turned out to be completely unresponsive.
斯かる実情において、本発明者らは鋭意研究を行なった
結果、アントラニル酸誘導体の還元には水素化ホウ素ナ
トリウムと塩化亜鉛の組み合わせがきわめてすぐれた還
元剤であることを見い出し本発明を完成した。Under these circumstances, the inventors of the present invention conducted intensive research and found that a combination of sodium borohydride and zinc chloride is an extremely excellent reducing agent for reducing anthranilic acid derivatives, thereby completing the present invention.
本発明方法においてはエチルエーテルや水素化アルミニ
ウムリチウムを使用しないため安全性が高く、安価であ
るという利点がもたらされた。しかも本発明方法は水素
化アルミニウムリチウムを用いる還元方法とくらべても
、そん色のない収率が得られるものである。本発明方法
は一般式(I)の2−アミ/ベンジルアルコール類の製
造法として、1、 使用する試薬が安圃である。Since the method of the present invention does not use ethyl ether or lithium aluminum hydride, it has the advantages of high safety and low cost. Moreover, the method of the present invention provides a yield comparable to that of a reduction method using lithium aluminum hydride. The method of the present invention is a method for producing 2-amino/benzyl alcohols of general formula (I), and includes the following: 1. The reagents used are safe.
2、 安全性がすぐれている。2. Excellent safety.
3、処理が簡便である。3. Processing is simple.
など工業的方法として極めてシれた利点を備えている。It has extremely advantages as an industrial method.
以下に本発明の詳細な説明する。The present invention will be explained in detail below.
前記一般式(fl)であられされるアントラニル酸誘導
体を、溶媒としてテトラヒドロフランを用イ。The anthranilic acid derivative represented by the general formula (fl) is prepared using tetrahydrofuran as a solvent.
通常原料に対して1.0〜4.0倍モル景、好ましくは
1.5〜2.0倍モル量の水素化ホウ素ナトリウム及び
0.5〜1.5倍モル足好ましくは0.75〜1.0倍
モル量の塩化亜鉛を用いて25℃〜70℃好ましくは還
流下で30分〜24時間、好ましくは1時間〜3時間反
応を行なわせる。反応終了後、塩化アンモニウム溶液又
はアンモニア水を滴下し、不溶物をf別後溶媒を減圧留
去する。必要に応じてエーテル、酢酸エチル、りpロホ
ルム、ベンゼン等の有機溶媒を用いて加吊し、食塩水で
洗浄した後濃縮する。1.0 to 4.0 times the molar amount, preferably 1.5 to 2.0 times the molar amount of sodium borohydride and preferably 0.75 to 1.5 times the molar amount of the normal raw material. Using 1.0 times the molar amount of zinc chloride, the reaction is carried out at 25 DEG C. to 70 DEG C., preferably under reflux, for 30 minutes to 24 hours, preferably 1 hour to 3 hours. After the reaction is completed, ammonium chloride solution or aqueous ammonia is added dropwise, insoluble materials are removed, and the solvent is distilled off under reduced pressure. If necessary, the suspension is suspended using an organic solvent such as ether, ethyl acetate, polyproform, or benzene, washed with brine, and then concentrated.
かくして、一般式(I)で表わされる2−アミノベンジ
ルアルコール類を得ることができる。In this way, 2-aminobenzyl alcohols represented by general formula (I) can be obtained.
以下に実施例を揚げ、本発明を具体例をもって詳述する
。EXAMPLES The present invention will be explained in detail with reference to Examples below.
X雄側1. 2−ジメチルアミノベンジルアルツー」ク
ー
N 、 N−ジメチルアントラニル酸メチル30F(0
,167モル)のテトラヒドロフラン15Qmti液中
に水I化ホウ素ナトリウム9.54 f (0,251
モル〕及び塩化亜鉛17.11(0,126モル)を加
え1.5時間還流する。反応混合物を冷却後、酢酸エチ
ル150mtを加えた後、飽和塩化アンモニウム溶液3
4.5mtを滴下し不溶物をr別する。P液を減圧濃縮
し残渣にベンゼン150mAを加え、飽和食塩水で洗浄
する。芒硝乾f!f!後、溶媒を減圧留去し23.9
f (95%)(7)2−17メチルアミノベンジルア
ルコールを淡黄色油状物として得る。X male side 1. 2-dimethylaminobenzylartzyl-N, methyl N-dimethylanthranilate 30F (0
, 167 mol) of sodium borohydride (9.54 f (0,251
mol] and 17.11 (0,126 mol) of zinc chloride were added, and the mixture was refluxed for 1.5 hours. After cooling the reaction mixture, 150 mt of ethyl acetate was added, and 3 ml of saturated ammonium chloride solution was added.
Add 4.5mt dropwise and separate the insoluble matter. The P solution is concentrated under reduced pressure, 150 mA of benzene is added to the residue, and the mixture is washed with saturated brine. Glauber's salt f! f! After that, the solvent was distilled off under reduced pressure to give 23.9
f (95%) (7) 2-17 Methylaminobenzyl alcohol is obtained as a pale yellow oil.
’HNMR(CDC1,) ;δ(ppm)2.70
(S、6H,−N(CH,)2)4−78 (ST
2 H+ −cH,oH)5、36 (broad
6 、 I H、−0H)6、88−7.32
(m、4H,aromatic protons)実M
例2. 2−ジエチルアミノベンジルアルツー上
N、N−ジエチルアントラニル酸エチル2.9f(0,
013モル)のテトラヒドロフラン7、5 ml溶液中
に水素化ホウ累ナトリウム0.76F(0,02モル)
及び塩化亜鉛1.36f(0,01モル〕を加え2時間
還流する。反応混合物を冷却後、酢酸エチル7、5 m
Aを加えた後飽和塩化アンモニウム溶液2.6 mlを
滴下し、不溶物をP別する。iF液を減圧濃縮して2.
25f(96%)の2−ジエチルアミノベンジルアルコ
ールを淡黄色油状物として得る。'HNMR (CDC1,) ; δ (ppm) 2.70
(S,6H,-N(CH,)2)4-78 (ST
2 H+ -cH,oH)5,36 (broad
6, IH, -0H) 6, 88-7.32
(m, 4H, aromatic protons) real M
Example 2. Ethyl N,N-diethylanthranilate 2.9f (0,
0.76 F (0.02 mol) of sodium borohydride in a 7.5 ml solution of tetrahydrofuran (0.13 mol)
and 1.36 f (0.01 mol) of zinc chloride were added and refluxed for 2 hours. After cooling the reaction mixture, 7.5 m of ethyl acetate was added.
After adding A, 2.6 ml of saturated ammonium chloride solution was added dropwise, and insoluble materials were separated from P. 2. Concentrate the iF solution under reduced pressure.
25f (96%) of 2-diethylaminobenzyl alcohol is obtained as a pale yellow oil.
’HNMR(CDC1a) ;δ(ppm)1−04
(’ * 6Ht に8 Hz * −NCH2C
Hs X2 )3.02 (q、4H,J=8Hz
、−NCH,CH3x2)4.84 (S、2H,
−CH20H)6.60 (broacl、s、I
H,−0H)6.90−7.38 (m、4H,ar
■m1icprotonり実施例3. 2−メチルアミ
ノベンジルアルコールN−メチルアントラニル酸メチル
1.65F(0,01モル)のテトラヒドロフラン7、
5 ml溶液中に水素化ホウ素ナトリウム0.76F(
0,02モル)及び塩化亜鉛1.36F(0,01モル
)を加え1時間還流する。反応混合物を冷却後酢酸エチ
ル7、5 mlを加えた後飽和塩化アンモニウム溶液4
.0 mlを滴下し、不溶物をP別する。P液を減圧濃
縮し、残渣に酢酸エチル20m1を加え、飽和食塩水で
洗浄後芒硝乾燥する。芒硝なf別後、溶媒を減圧留去し
1.11F(81%)の2−メチルアミノペンジルアル
コールヲ無色油状物として得る。'HNMR (CDC1a); δ (ppm) 1-04
(' * 6Ht to 8 Hz * -NCH2C
Hs X2 ) 3.02 (q, 4H, J=8Hz
, -NCH,CH3x2)4.84 (S,2H,
-CH20H)6.60 (broacl, s, I
H, -0H)6.90-7.38 (m,4H,ar
■m1icproton Example 3. 2-methylaminobenzyl alcohol methyl N-methylanthranilate 1.65 F (0.01 mol) of tetrahydrofuran 7,
Sodium borohydride 0.76F (
0.02 mol) and 1.36F (0.01 mol) of zinc chloride were added and refluxed for 1 hour. After cooling the reaction mixture, 7.5 ml of ethyl acetate was added, and then 4 ml of saturated ammonium chloride solution was added.
.. Add 0 ml dropwise and separate the insoluble matter. The P solution is concentrated under reduced pressure, and 20 ml of ethyl acetate is added to the residue, which is washed with saturated brine and dried with sodium sulfate. After removing the mirabilite, the solvent was distilled off under reduced pressure to obtain 1.11 F (81%) 2-methylaminopenzyl alcohol as a colorless oil.
’HNMR(CDC1,) ;δ(ppm)!
2.80 (s、aH,−NCH,)3.30
(broad、s、IH,−0H)4.52 (
B、2H,−CH20H)6.44−7.28 (m
、4H,aromaticprotons)実施例4.
2−アミノベンジルアルコールアントラニル「ネメチ
ルx、51y(0,01モル)のテトラヒドロフラフ7
、5 ml溶液中に水素化ホウ素ナトリウム0.769
(0,02モル)及び塩化亜鉛1.36F(0,01モ
ル)を加え1時間還流する。友応混合物を冷却後酢酸エ
チル7、5 mlを加えた後飽和塩化アンモニウム溶液
4.0 mtを滴下し不溶物をデ別する。'HNMR (CDC1,) ; δ (ppm)! 2.80 (s, aH, -NCH,)3.30
(broad, s, IH, -0H)4.52 (
B, 2H, -CH20H) 6.44-7.28 (m
, 4H, aromatic protons) Example 4.
2-Aminobenzyl alcohol anthranyl "tetrahydrofuraf of nemethyl x, 51y (0,01 mol) 7
, 0.769 sodium borohydride in 5 ml solution
(0.02 mol) and zinc chloride 1.36F (0.01 mol) were added and refluxed for 1 hour. After cooling the mixture, 7.5 ml of ethyl acetate was added, and 4.0 ml of saturated ammonium chloride solution was added dropwise to remove insoluble materials.
P液を減圧濃縮し残渣をシリカゲルカラム(クロロホル
ム−メタノール)にかけo、97f19%)の2−アミ
ノベンジルアルコールを白色結晶として得る。The P solution was concentrated under reduced pressure and the residue was applied to a silica gel column (chloroform-methanol) to obtain 2-aminobenzyl alcohol (97F, 19%) as white crystals.
’HNMR(CDC乙s) ; a (ppm)3、5
0 (broad6,3H,−N)I、 、OH)
4、48 (s 、 2H、−CH20H)6.4
0−7.28 (m、4H,aromaticpro
tons)実21H’lJ5. 2−ジメチルアミノベ
ンジルアルコ−]
N 、N−ジlfルア7 ) ラニに酸1.65F(0
,01モル)のTHP 7.5 mA溶液に水素化ホウ
素ナトリウえ、2時間加熱還流する。反応混合物を水冷
後、エーテル20mtを加え、飽和塩化アンモニウム溶
液3mtを滴下する。不溶物をr別し、F液を減圧濃縮
し、残渣をシリカゲルカラム(クロロホルムメタノール
= 10010〜100/1 )にかけ700キ(46
%) (1) 2− ジメチルアミノベンジルアルコー
ルを無色油状物として得る。'HNMR (CDC); a (ppm) 3, 5
0 (broad6,3H,-N)I, ,OH)
4, 48 (s, 2H, -CH20H)6.4
0-7.28 (m, 4H, aromaticpro
tons) Real 21H'lJ5. 2-dimethylaminobenzylalco-]N,N-dilflua7) Rani acid 1.65F (0
, 01 mol) in THP 7.5 mA was added sodium borohydride and heated under reflux for 2 hours. After cooling the reaction mixture with water, 20 mt of ether was added, and 3 mt of saturated ammonium chloride solution was added dropwise. Insoluble materials were separated, liquid F was concentrated under reduced pressure, and the residue was applied to a silica gel column (chloroform methanol = 10,010 to 100/1) to 700 kg (46 kg).
%) (1) 2-Dimethylaminobenzyl alcohol is obtained as a colorless oil.
Claims (1)
アルキル基を意味する)で表わされるアントラニル酸誘
導体を塩化亜鉛存在下、水素化ホウ素ナトリウムを用い
て還元させることを特徴とする一般式▲数式、化学式、
表等があります▼( I ) (式中、R_2及びR_3は前記と同じ)で表わされる
2−アミノベンジルアルコール類の製造法。[Claims] General formula ▲ Numerical formula, chemical formula, table, etc. ▼ (II) (In the formula, R_1, R_2 and R_3 mean a hydrogen atom or a lower alkyl group) An anthranilic acid derivative represented by zinc chloride General formula characterized by reduction using sodium borohydride in the presence of ▲Mathematical formula, chemical formula,
There are tables, etc.▼(I) Method for producing 2-aminobenzyl alcohols represented by (in the formula, R_2 and R_3 are the same as above).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60171026A JPS6233139A (en) | 1985-08-05 | 1985-08-05 | Production of 2-aminobenzyl alcohol |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60171026A JPS6233139A (en) | 1985-08-05 | 1985-08-05 | Production of 2-aminobenzyl alcohol |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6233139A true JPS6233139A (en) | 1987-02-13 |
JPH0558420B2 JPH0558420B2 (en) | 1993-08-26 |
Family
ID=15915708
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60171026A Granted JPS6233139A (en) | 1985-08-05 | 1985-08-05 | Production of 2-aminobenzyl alcohol |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6233139A (en) |
-
1985
- 1985-08-05 JP JP60171026A patent/JPS6233139A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0558420B2 (en) | 1993-08-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3544590A (en) | Cyclic amines and the process for their formation | |
GB2021589A (en) | Process for Preparation of Compounds Containing Phosphorus-Carbon-Nitrogen Bond | |
Luhowy et al. | Improved synthesis of aminoethanethiols | |
JPS6233139A (en) | Production of 2-aminobenzyl alcohol | |
DK0612310T3 (en) | Process for the preparation of cinnamic acid derivatives | |
JPS6440467A (en) | Novel substituted diphenylimidazole derivative | |
JPS5949221B2 (en) | Method for producing 3-acylamino-4-homoisotwistane | |
DeTar et al. | Intramolecular Reactions. IV. Chain Transfer Reaction Involving an Aromatic Hydrogen Atom and Related Reactions of 2-(4'-Methylbenzoyl)-benzenediazonium Salts1 | |
US3900476A (en) | 2(2'-pyrimidylamino)quinazolines and their preparation | |
US3448137A (en) | Method of preparing 4-alkyl-2,2-dimethyl-2-silamorpholines | |
Forbes et al. | An Extension of the Woodward Rules Concerning Alkyl Substituents in Conjugated Aliphatic Systems | |
Červinka et al. | Absolute configurations of some heterocyclic acids | |
JPS61229873A (en) | Manufacture of 2-mercaptobenzoxazole | |
US3293260A (en) | 1-substituted cycloheptimidazol-2(1h)-one compounds | |
US4013673A (en) | 2,3-dihydro-3-(2-pyridinyl)-4h-1-benzopyran-4-one n-oxides | |
CN109369537A (en) | A kind of synthetic method of 2,2`- bisbenzimidazole | |
JPS5838268A (en) | Preparation of uracil | |
JPS62292777A (en) | Fluorine-containing coumarones | |
JPS5750965A (en) | Preparation of n-methyl-4-benzazonine derivative | |
JPS5576863A (en) | Preparation of 2-chloronicotinic acid | |
JPS6043067B2 (en) | 2-Alkoxyindolizine derivatives and their production method | |
JPS55130948A (en) | Asymmetric hydrogenation of alpha-aminoacrylic acid derivative | |
JPH0491075A (en) | Organic peracid salt and its production | |
JPS54112881A (en) | Preparation of 2-mercaptopyrimidine hydrochloride | |
JPS5721387A (en) | Preparation of oxazolidinone derivative |