Process for the preparation of condensed as-triazine derivatives
US4871846A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1987 |
| Grant date | Oct 3, 1989 |
| Priority date | — |
| Expiry date | Apr 28, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D217/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of condensed as-triazinium derivatives of the formula I ##STR1## and isomers thereof, wherein R.sub.1 inter alia is an alkyl group, R.sub.2 inter alia is hydrogen or an alkyl group and R.sub.3 is hydrogen and where Z is a group of the formula a or b ##STR2## which comprises reacting a compound of the formula II ##STR3## where Y is a group of the formula c or d ##STR4## with a compound of the formula IIa EQU NH.sub.2 --CO--R.sub.2 (IIa) in the presence of a dehydrating agent. The advantage of the process is that it consists of fewer reaction steps and provides higher yields than the known methods. The compounds of formula I are pharmaceutically active known derivatives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.