Patent · US Expired

Method of optical resolution of (.+-.)-2-amino-1-butanol and/or (.+-.)-mandelic acid

US4340751A · kind A · utility

3Cited by

4References

7Claims

0Family size

Assignee

Hiroyuki Nohira · JP

Inventors

Hiroyuki Nohira · Saitama, JP
Hiroshi Fujii · Tokyo, JP
Masami Yajima · Saitama, JP
Rieko Fujimura · Saitama, JP

Key dates

Filing date	Mar 5, 1981
Grant date	Jul 20, 1982
Priority date	—
Expiry date	Mar 5, 2001

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C215/08
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

(.+-.)-2-Amino-1-butanol and/or (.+-.)-mandelic acid are optically resolved with a high resolution efficiency and high optical purities by preferentially crystallizing out one of the pair of less soluble enantiomeric salts (or optical antipodes), namely (+)-2-amino-1-butanol-(+)-mandelic acid salt and (-)-2-amino-1-butanol-(-)-mandelic acid salt.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.