2-substituted-1-hydroxyindoles
US5183894A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1991 |
| Grant date | Feb 2, 1993 |
| Priority date | — |
| Expiry date | Jul 1, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D405/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to 2-substituted-1-hydroxyindoles of the following formula: ##STR1## wherein, R.sup.1 is an electron withdrawing group, PA1 R.sup.2 is an alkenyl having 2-10 carbon atoms, and N-substituted .alpha.-iminobenzyl group wherein the substituents are selected from the group consisting of phenyl, anilino and dimethylamino, an unsubstituted aromatic group, and an aromatic group having meta or para substituents which are nitro, trifluoromethyl, fluoro, formyl, hydroxyiminomethyl and carbamoyl, PA1 R.sup.3 is a halogen atom, and PA1 n is 0, 1, or 2, provided that when R.sup.2 is either phenyl or nitro substituted phenyl and n is 0, then R.sup.1 is not cyano.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.