Substitution reactions of 2-phenylsulphonyl-piperidines and -pyrrolidines with carbon nucleophiles: Synthesis of the pyrrolidine alkaloids norruspoline and ruspolinone
作者:Dearg S. Brown、Philippe Charreau、Thomas Hansson、Steven V. Ley
DOI:10.1016/s0040-4020(01)86388-2
日期:1991.1
treatment with benzenesulphinic acid. On reaction with various carbon nucleophiles these sulphones gave good yields of substitution products. Typical nucleophiles used in these studies were organometallic reagents derived from Grignard reagents and zinc halide together with silyl enol ethers, silyl ketene acetals, allylsilanes and trimethylsilyl cyanide in the presence of a Lewis acid. These methods
通过用苯磺酸进行处理,由相应的N-酰基氨基缩醛制备几种2-苯基磺酰基-哌啶和-吡咯烷。在与各种碳亲核试剂反应时,这些砜产生了良好的取代产物收率。这些研究中使用的典型亲核试剂是衍生自Grignard试剂的有机金属试剂和卤化锌,以及在路易斯酸存在下的甲硅烷基烯醇醚,甲硅烷基烯酮缩醛,烯丙基硅烷和三甲基甲硅烷基氰化物。这些方法被用于合成两种天然产物生物碱。去甲去氧肾上腺素(38)和Ruspolinone(40)。