Process to chloroketoamines using carbamates
US5922916A · kind A · utility
1Cited by
0References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1998 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Apr 13, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C221/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for preparing 5-methylene cyclic carbamates either by cyclization of an alkynyl amine with carbon dioxide in the presence of a copper catalyst or by forming an isocyanate from a substituted acetoacetamide followed by hydrolysis. The 5-methylene cyclic carbamates by either method are converted to 5-(chloromethylene) cyclic carbamates, using trichloroisocyanuric acid, followed by hydrolysis to a chloroketoamine. The chloroketoamine from the process of this invention additionally can be reacted with an organic acid chloride to form an amide compound which is useful as a fungicide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.