N-[4-[.omega.-(4-acyl-3-hydroxyphenoxy)alkoxy]-p henyl]1H-tetrazole-5-carboxamides and use thereof as anti-allergics
US4675333A · kind A · utility
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7Claims
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Key dates
| Filing date | Dec 5, 1984 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | Dec 5, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There are described compounds of the formula ##STR1## in which R.sup.1 is hydrogen or C.sub.1-6 alkyl, R.sup.2 is hydrogen, C.sub.1-6 alkyl or C.sub.3-6 alkenyl, R.sup.3 is hydrogen or C.sub.1-6 alkyl, R.sup.4 is hydrogen or an N-protecting group, n is 2, 3, 4 or 5, and X is oxygen, sulphur or --CH.sub.2 --, provided that when X is --CH.sub.2 -- n is 0; and salts thereof. The compounds in which R.sup.4 is hydrogen have pharmaceutical activity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.