Process for preparing 2-chlorosulfinylazetidinones
US4289695A · kind A · utility
9Cited by
3References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 18, 1979 |
| Grant date | Sep 15, 1981 |
| Priority date | — |
| Expiry date | Jun 18, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Improved process for converting a penicillin sulfoxide ester to a 2-chlorosulfinylazetidin-4-one intermediate which on cyclization affords a 3-exomethylenecepham sulfoxide, wherein the penicillin sulfoxide ester is reacted with an N-chloro halogenating agent in the presence of a cross-linked polyvinylpyridine polymer to provide the 2-chlorosulfinylazetidin-4-one.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.