A Simple and Efficient Synthesis of Heterocycle-Fused 2<i>H</i>-Thiopyrans, Furo-, Benzofuro-, Thieno-, Benzothieno-, Pyrrolo- and Indolo-2<i>H</i>- thiopyrans, from Heteroaromatic Thioketones and α-Chloroacrylonitrile or α-Bromoacrylic Esters via a Hetero Diels-Alder Reaction-Dehydrohalogenation Process
An efficient and convenient procedure is described for the synthesis of heterocycle-fused 2H-thiopyrans having ortho-dimethylene structures via a hetero Diels-Alder reaction-dehydrohalogenation process starting from heteroaromatic thioketones and α-chloro-acrylonitrile or α-bromoacrylates.
A New and Simple Synthesis of Heterocycle-Fused [c]Thiophenes: Reaction of Heteroaromatic Thioketones with Bis(arylsulfonyl)diazomethanes and Phenyliodonium Bis(phenylsulfonyl)methylide
作者:Takao Saito、Hideki Kikuchi、Akiko Kondo
DOI:10.1055/s-1995-3852
日期:1995.1
A new method for the synthesis of heterocycle-fused [c]thiophenes via reaction of aryl heteroaryl thioketones with the carbene precursors, bis(arylsulfonyl)diazomethanes and phenyliodonium bis(phenylsulfonyl)methylide, is described.
THE REACTION OF 2<i>H</i>-THIIN DERIVATIVES WITH PERACID. RING CONTRACTION AND ALKOXYLATION REACTIONS
作者:Haruo Ohmura、Shinichi Motoki
DOI:10.1246/cl.1984.1973
日期:1984.11.5
The cycloaddition reaction of aromatic thioketones (aryl naphthyl thioketones and 2-benzofuryl phenyl thioketone) with 2-chloroacrylonitrile followed by elimination of hydrogen chloride gave some 2H-thiin derivatives. The products reacted with MCPBA and an alcohol to afford ring-contracted product and alkoxylated derivatives.