A New and Simple Synthesis of Heterocycle-Fused [c]Thiophenes: Reaction of Heteroaromatic Thioketones with Bis(arylsulfonyl)diazomethanes and Phenyliodonium Bis(phenylsulfonyl)methylide - Saito, Takao; Kikuchi, Hideki; Kondo, Akiko (Synthesis, 1995)