Cycloaddition Reactions of Heteroaromatic Thioketones with Maleic Anhydride, Norbornene, Acrylonitrile, Styrene, and 2-Chloroacrylonitrile
作者:Haruo Ohmura、Shinichi Motoki
DOI:10.1246/bcsj.57.1131
日期:1984.4
Heteroaromatic thioketones react with maleic anhydride, norbornene, acrylonitrile, and styrene to form the Diels-Alder adducts, respectively. The thioketones also undergo cycloaddition with 2-chloroacrylonitrile followed by elimination of hydrogen chloride to give heteroaromatic analogues of o-quinodimethan derivatives. In these reactions, the thioketones act as a heterodiene on the dienophiles to
杂芳族硫酮分别与马来酸酐、降冰片烯、丙烯腈和苯乙烯反应形成狄尔斯-阿尔德加合物。硫酮还与 2-氯丙烯腈发生环加成反应,然后消除氯化氢,得到邻醌二甲烷衍生物的杂芳族类似物。在这些反应中,硫酮作为亲二烯体上的杂二烯,区域选择性地产生 [4+2] 环加合物。