Intramolecular [3 + 2]cycloadditions: synthesis of 1-methylene-2,3,3a,4,5,9b-hexahydro-1H-benz[e]indenes and an unsuccessful approach to ergot alkaloids
作者:Michael P. Collins、Michael G. B. Drew、John Mann、Harry Finch
DOI:10.1039/p19920003211
日期:——
3-enyl)-4-methoxybenzenes, prepared by a short synthesis, underwent intramolecular [3 + 2]cycloadditions to produce the title indenes. An analogous intramolecular cycloaddition was attempted with N-benzyl-4-(2-methoxyvinyl)-3-(2-hydroxy-3-trimethylsilylmethylbut-3-enyl)indoline, in an attempt to produce a key intermediate for ergot alkaloid synthesis, but this was unsuccessful.
通过短合成法制备的1-(1-羟基-2-三甲基甲硅烷基甲基丙-2-烯基)-2-(4-取代的丁-3-烯基)-4-甲氧基苯经历分子内[3 + 2]环加成反应头衔。尝试用N-苄基-4-(2-甲氧基乙烯基)-3-(2-羟基-3-三甲基甲硅烷基甲基丁-3-烯基)二氢吲哚进行类似的分子内环加成反应,以尝试生成麦角生物碱合成的关键中间体,但是这是不成功的。