Process for 3-exomethylenecepham sulfoxides
US4190724A · kind A · utility
7Cited by
1References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1978 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Nov 13, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for 3-exomethylenecepham sulfoxides comprising reacting a 2-chlorosulfinylazetidin-4-one ester with stannic chloride in the presence of oxo compounds, for example lower alkyl ethers and lower alkyl ketones, to form a stannic chloride complex with 2-chlorosulfinylazetidinone stabilized with said oxo compounds which, upon treatment with an hydroxy-containing compound such as methyl alcohol, decomposes providing said 3-exomethylenecepham sulfoxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.