Pyridazinone manufacture
US5003068A · kind A · utility
1Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1989 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Sep 13, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D237/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improved method for the manufacture of a substituted 1,4-dihydro-4-oxopyridazine which comprises the step of reacting a glyoxyclic acid halide phenylhydrazone with 3-pyrrolidinyl-2-alkenoic acid ester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.