Synthesis of intermediates useful in preparing tricyclic compounds
US5998620A · kind A · utility
3Cited by
6References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1998 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Mar 23, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D221/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for preparing a compound of the formula ##STR1## comprising reacting a bromo-substituted pyridine with an amine of the formula NHR.sup.5 R.sup.6, reacting the resulting amide with an iodo-halomethyl-substituted compound and cyclizing the resultant product, wherein R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as defined in the specification; also claimed are a compound of the formula ##STR2## and a process for preparing it from the corresponding halo-substituted benzoic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.