6-substituted amino-4H-pyrano(3,2-G)quinoline-2,8-dicarboxylic acid intermediates
US4614802A · kind A · utility
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3Claims
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Key dates
| Filing date | Jun 4, 1984 |
| Grant date | Sep 30, 1986 |
| Priority date | — |
| Expiry date | Jun 4, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P37/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed are compounds of the formula ##STR1## in which R is hydrogen or alkyl C.sub.1 to C.sub.6 and R.sub.5 and R.sub.10, which may be the same or different, are hydrogen or alkyl C.sub.1 to C.sub.6, PA0 X represents a group --AR.sub.6, PA0 A is CO or SO.sub.2 and R.sub.6 is halogen, C.sub.1 -C.sub.6 haloalkyl, C.sub.1 -C.sub.6 alkoxy, C.sub.6 -C.sub.9 aryloxy or phenyl optionally substituted by C.sub.1 -C.sub.6 alkyl, and salts, esters, and amides which are intermediates to anti-allergic compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.