Derivatives of p-substituted phenyl ester of pivalic acid
US5336681A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1992 |
| Grant date | Aug 9, 1994 |
| Priority date | — |
| Expiry date | Oct 13, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D319/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A derivative of general formula: ##STR1## wherein Y is --SO.sub.2 -- or ##STR2## (i) R.sup.1 and R.sup.2, which may the same or different, each represent, (1) --H, (2) C1-16 alkyl or (3) the formula: --X--A-- (R.sup.4)n wherein X is single-bond, --SO.sub.2 --, C1-4 alkylene, C1-4 alkylene substituted by --COOH or ##STR3## --A-- is a pyridyl or pyrrolyl ring, n is 1.about.5, R.sup.4 is 1 --H or C1-8 alkyl, 2 C1-14 alkoxy, 3 C1-6 alkylthio, 4 --OH, halogen, --NO.sub.2 or trihalomethyl, 5 the formula: --NR.sup.41 R.sup.42 wherein R.sup.41 and R.sup.42 each represents halogen or C1-4 alkyl, 6 tetrazole, 7 --SO.sub.3 H or --CH.sub.2 OH, 8 the formula: --SO.sub.2 NR.sup.41 R.sup.42 9 the formula: --Z.sup.41 --COOR.sup.43 wherein Z.sup.41 is single-bond, C1-4 alkylene or C2-4 alkenylene, R.sup.43 is --H, C1-4 alkyl or benzyl; or non-toxic salt or an acid addition salt thereof possess inhibitory activity on elastase, and therefore is useful for treating pulmonary emphysema, atherosclerosis and rheumatoid arthritis and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.