Substituted benzonitriles
US4677219A · kind A · utility
10Cited by
0References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1986 |
| Grant date | Jun 30, 1987 |
| Priority date | — |
| Expiry date | Jul 17, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C255/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improved process for the preparation of 6-substituted-5-alkyl-2,4-quinazolinediamines, useful in the production of trimetrexate and similar antifolate agents, together with several novel intermediates are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.