2-phenyl-2-(2'-piperidinylidene)acetate derivative, process for manufacturing the same, and process for manufacturing optically active 2-phenyl-2-(2'-piperidinyl)acetate derivative by asymmetrically hydrogenating the same
US5859249A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1997 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Jul 16, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D211/70
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a 2-phenyl-2-(2'-piperidinylidene)acetate derivative suitably used for a raw material of a 2-phenyl-2-(2'-piperidinyl)acetate derivative and a process for manufacturing the same. Also disclosed is a process for manufacturing an optically active 2-phenyl-2-(2'-piperidinyl)acetate derivative which is a major intermediate for an antidepressant. The 2-phenyl-2-(2'-piperidinylidene)acetate derivative is manufactured by cyclizing a 7-(N-substituted amino)-3-oxo-2-heptanoate derivative. The optically active 2-phenyl-2-(2'-piperidinyl)acetate derivative is manufactured by asymmetrically hydrogenating the 2-phenyl-2-(2'-piperidinylidene)acetate derivative in the presence of a complex of a Group VIII transition metal or an acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.