Functional derivatives of thiophene
A method was developed for the synthesis of 5-acylamino-2,3-dimethyl-and 5-acylamino-2,3-tetramethylenethiophenes by decarboxylation of the corresponding 5-acylaminothiophene-4-carboxylic acids. The azo coupling and aminomethylation of the synthesized acylaminothiophenes were studied.