Process for preparing certain 6-phenoxy-2-pyridinecarboxaldehydes
AssigneeThe Dow Chemical Company
InventorSudarshan K. Malhotra
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Abstract
Compounds are prepared corresponding to the formula ##STR1## wherein Y represents chloro or R'; R represents ##STR2## wherein X independently represents alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, alkylthio of 1 to 4 carbon atoms, alkyl sulfonyl of 1 to 4 carbon atoms, trifluoromethyl, chloro, fluoro or bromo; n represents an integer of 0 to 2 or X.sub.n represents 3,4-methylenedioxy and R' represents R with the proviso that R and R' can be the same or different. The compounds are useful as intermediates for the preparation of insecticidal substituted pyridine methyl esters of cyclopropane carboxylic acids.
Claims7
A process for the preparation of compounds corresponding to the formula ##STR35## wherein R' represents R;
- R represents ##STR36## and wherein X independently represents alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, alkylthio of 1 to 4 carbon atoms, alkyl sulfonyl of 1 to 4 carbon atoms, trifluoromethyl, chloro, fluoro or bromo;
- n represents an integer of 0 to 2 or X.sub.n represents 3,4-methylenedioxy with the proviso that R and R' can be the same or different, which comprises, heating to a temperature of from about 60.degree. to about 150.degree. C. a compound of the formula ##STR37## and an excess of an inorganic or organic acid in the presence of a solvent for a period of time sufficient to convert the starting compound to the desired product and separating the desired product therefrom.
Dependencies are inferred from the claim text.