Phenoxyalkylcarboxylic acid derivatives and process for their preparations
US4985585A · kind A · utility
15Cited by
1References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1989 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | Feb 23, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C317/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Phenoxyalkylcarboxylic acid derivatives of the following formula, ##STR1## wherein R.sup.1 indicates hydrogen atom, methyl group or ethyl group, m is an integer from 2 to 5, and n is an integer from 3 to 8, X.sup.1 and X.sup.2 each independently represent sulfur atom, oxygen atom, sulfinyl group or sulfonyl group, proviso X.sup.1 and X.sup.2 are not simultaneously oxygen atom; their alkali salts and hydrates thereof are useful as antiallergic agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.