Process for the preparation of lactam derivatives
US5196534A · kind A · utility
17Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1991 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | May 22, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D211/86
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for the preparation of a compound of formula (I) ##STR1## wherein R represent a hydrogen atom or a methyl or ethyl group, which comprises cyclising a compound of formul (IV) ##STR2## Where R represents a hydrogen atom, the compound of formula (IV) may optionally be alkylated to produce a compound in whcich R is methyl or ethyl. The compound of formula (I) is useful as an intermediate in the preparation of 2,3,4,5-tetrahydro-2-[(imidazol-4(or 5)-yl)methyl]-1H-pyrido[4,3-b]indol-1-ones having 5-HT.sub.3 antagonist activity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.