The 1,3-Dipolar Cycloaddition Reactions of Heteroaromatic Dicyanomethylides with Phenylsulfinylethene and Bis(trimethylsilyl)ethyne: Synthesis of 1,2-Unsubstituted 3-Cyanoindolizines
作者:Kiyoshi Matsumoto、Takane Uchida、Yukio Ikemi、Toshio Tanaka、Momoyo Asahi、Tomoe Kato、Hideyuki Konishi
DOI:10.1246/bcsj.60.3645
日期:1987.10
Pyridinium and diazinium dicyanomethylides underwent 1,3-dipolar cycloaddition-extrusion reactions with phenylsulfinylethene, producing the corresponding 3-cyanoindolizines in moderate to good yields. 1,3-Dipolar cycloadditions of these ylides with bis(trimethylsilyl)ethyne gave either the 1,2-bis(trimethylsilyl)-3-cyanoindolizines or the 1-trimethylsilyl-3-cyanoindolizines, or mixtures of these, depending
吡啶鎓和二氰基二嗪鎓与苯基亚磺酰基乙烯进行 1,3-偶极环加成-挤出反应,以中等至良好的产率生产相应的 3-氰基吲哚嗪。这些叶立德与双(三甲基甲硅烷基)乙炔的 1,3-偶极环加成得到 1,2-双(三甲基甲硅烷基)-3-氰基吲哚啉或 1-三甲基甲硅烷基-3-氰基吲哚啉,或它们的混合物,这取决于取代基和吡啶环中存在另一个氮原子。在回流的氯仿中用硅胶处理后,1,2-双(三甲基甲硅烷基)-3-氰基吲哚嗪在 2 位发生区域特异性原脱甲硅烷基化反应,生成 1-三甲基甲硅烷基-3-氰基吲哚嗪。1,2-双(三甲基甲硅烷基)-,