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1. WO1997029082 - PROCESS FOR PRODUCING OPTICALLY ACTIVE CYANOHYDRINS

Publication Number WO/1997/029082
Publication Date 14.08.1997
International Application No. PCT/JP1997/000319
International Filing Date 07.02.1997
Chapter 2 Demand Filed 05.06.1997
IPC
C07C 253/34 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
253Preparation of carboxylic acid nitriles
32Separation; Purification; Stabilisation; Use of additives
34Separation; Purification
C07C 255/43 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
255Carboxylic acid nitriles
01having cyano groups bound to acyclic carbon atoms
32having cyano groups bound to acyclic carbon atoms of a carbon skeleton containing at least one six-membered aromatic ring
42the carbon skeleton being further substituted by singly-bound nitrogen atoms, not being further bound to other hetero atoms
43the carbon skeleton being further substituted by singly-bound oxygen atoms
CPC
C07B 2200/07
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
BGENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
2200Indexing scheme relating to specific properties of organic compounds
07Optical isomers
C07C 253/34
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
253Preparation of carboxylic acid nitriles
32Separation; Purification; Stabilisation; Use of additives
34Separation; Purification
Y02P 20/55
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
20Technologies relating to chemical industry
50Improvements relating to the production of bulk chemicals
55Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
Applicants
  • NIPPON KAYAKU KABUSHIKI KAISHA [JP]/[JP] (AllExceptUS)
  • MIYAZAWA, Yoshinobu [JP]/[JP] (UsOnly)
  • KOSHIGOE, Taichi [JP]/[JP] (UsOnly)
  • OHKAWA, Kouichi [JP]/[JP] (UsOnly)
  • SEKINE, Jouji [JP]/[JP] (UsOnly)
  • SAEKI, Shin-ichiro [JP]/[JP] (UsOnly)
Inventors
  • MIYAZAWA, Yoshinobu
  • KOSHIGOE, Taichi
  • OHKAWA, Kouichi
  • SEKINE, Jouji
  • SAEKI, Shin-ichiro
Agents
  • ASAMURA, Kiyoshi
Priority Data
8/4564708.02.1996JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) PROCESS FOR PRODUCING OPTICALLY ACTIVE CYANOHYDRINS
(FR) PROCEDE D'ELABORATION DE CYANOHYDRINES A ACTIVITE OPTIQUE
Abstract
(EN)
A mixture of diastereomers of a cyanohydrin is isomerized with respect to the 2-position carbon atom in the presence of an amine and an organic solvent while separating one of the optically active cyanohydrin isomers by crystallization to thereby efficiently produce a cyanohydrin represented by general formula (1), wherein R1 and R2 each represents hydrogen or an amino protective group; and the compound has an S or R configuration at the *3-position carbon atom, when it has an R or S configuration, respectively, at the *2-position carbon atom.
(FR)
On isomérise un mélange de diélastomères de cyanohydrine en ce qui concerne l'atome de carbone en position 2 en présence d'une amine et d'un solvant organique tout en séparant l'un des isomères de cyanohydrine à activité optique par cristallisation de manière à obtenir une cyanohydrine de formule générale (1), dans laquelle R1 et R2 représentent chacun H ou un groupe protecteur amino, le composé présentant une configuration S ou R au niveau de l'atome de carbone en position *3, lorsqu'il a une configuration R ou S au niveau de l'atome de carbone en position *2.
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