Abstract Reaction of ethyl 3, 4-dimethoxyphenylpropionale with chlorosulfonic acid yielded 2- carbo-elhoxyethyl-3, 4-dimelhoxybenzene sulfochloride, which was converted to 2- earboethoxyethyl-3, 4-dimethoxybenzcnesulfonamides by the action of ammonia or substituted aromatic amines. Alkaline hydrolysis of these sulfonumide esters furnished the corresponding acids. The reaction of acids with phosphorus pentachloride resulted in the ...
