(1,2,4)triazolo[2,3-a]pyridines
US5101028A · kind A · utility
5Cited by
1References
2Claims
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Assignee
Inventors
Key dates
| Filing date | Aug 10, 1990 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | Aug 10, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D471/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Triazolopyridines of the formula ##STR1## where R.sup.1 is C.sub.1 -C.sub.20 -alkyl which may be substituted, phenyl which may be substituted, or hydroxyl, PA0 R.sup.2 is hydrogen, formyl, nitroso, cyano or substituted methyl, PA0 R.sup.3 is hydrogen, cyano, carbamoyl, carboxyl or C.sub.1 -C.sub.4 -alkoxycarbonyl and PA0 R.sup.4 is hydroxyl, halogen, amino which may be substituted or the radical of a compound with an acidic CH, are prepared as described. The compounds are useful as intermediates in the preparation of dyes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.