Hussein A. M.

Atalla A. A.

Abdel-Hafez I. S.

Elnagdi M. H.

Studies with polyfunctionally substituted heteroaromatics : the reaction of 4-substituted 7-aminothienol[3,4-]pyridazines and of 2-methyl-6aminothienopyridine-5-thione with electron poor olefins and acetylenes