[4H]-1,3-Benzodioxin-2-carboxylic acids
US4281012A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1979 |
| Grant date | Jul 28, 1981 |
| Priority date | — |
| Expiry date | Apr 30, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel racemates and optically active isomers and mixtures of isomers of [4H]-1,3-benzodioxin-2-carboxylic acid compounds of the formula ##STR1## wherein R.sub.1 is selected from the group consisting of hydrogen, alkyl of 1 to 5 carbon atoms, dialkylamino alkyl with alkyls of 1 to 5 carbon atoms, alkali metal, alkaline earth metal, aluminum, --NH.sub.4, non-toxic pharmaceutically acceptable amines, 2,3-dihydroxypropanyl and (2,2-dimethyl-1,3-dioxolan-4-yl)-methyl, R.sub.2 is selected from the group consisting of hydrogen and alkyl of 1 to 5 carbon atoms, R.sub.3 and R.sub.6 are individually selected from the group consisting of hydrogen, alkyl of 1 to 6 carbon atoms, ethenyl and cyclohexyl and taken together with the carbon atom to which they are attached form cyclohexyl, R.sub.5 is selected from the group consisting of hydrogen and halogen or R.sub.1 and R.sub.2 have the above definitions, R.sub.6 is ##STR2## R.sub.4 and R.sub.5 are individually selected from the group consisting of hydrogen, halogen, --CF.sub.3, cyclohexyl, alkoxy of 1 to 3 carbon atoms, alkyl of 1 to 3 carbon atoms and p-chlorophenoxy and R.sub.3 is selected from the group consisting of 2-propenyl, ethenyl, cyclo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.