The chemistry of pyrrolic compounds. XXV. The chemistry of acetal and thioacetal derivatives of pyrrolic systems

The synthesis of acetal and thioacetal derivatives of simple pyrroles is described. Methods are reported which allow the use of the thioacetal function as a means of protecting a formyl group in a pyrrolic molecule during the preparation of a dipyrrylmethane. By this procedure certain α-formyldipyrrylmethanes, not accessible by other methods, have been obtained.