SEARCH Articles Figures Tables Carboxylic ketones Ethyl 4 -carboxylates Ethyl ketones Ethyl pyrrole-2-carboxylate Ketones carboxylation Pyrrol-2-yl-trichloromethyl ketone, with Pyrrole 2-carboxylate Pyrrole, carboxylation Pyrroles carboxylation Pyrroles with ketones Trichloromethyl Trichloromethyl ketones With ethanol to give ethyl pyrrole-2-carboxylate