Synthesis of substituted 3-arylpiperidines and 3-arylpyrrolidines by radical 1,4 and 1,2-aryl migrations
作者:Alexandru Gheorghe、Béatrice Quiclet-Sire、Xavier Vila、Samir Z. Zard
DOI:10.1016/j.tet.2007.04.091
日期:2007.7
A route to 3-arylpiperidines and 3-arylpyrrolidines involving radical 1,4- and 1,2-aryl migrations has been explored. For the piperidines, the first route requires a xanthate addition to an N-allylarylsulfonamide, followed by acetylation and treatment with lauroyl peroxide to give the corresponding 1,4-aryl transfer product. This compound can be converted into the desired piperidine derivative following
已经探索了涉及自由基1,4-和1,2-芳基迁移的3-芳基哌啶和3-芳基吡咯烷的途径。对于哌啶,第一途径要求将黄原酸酯加到N-烯丙基芳基磺酰胺中,然后乙酰化并用月桂酰过氧化物处理,得到相应的1,4-芳基转移产物。酸性水解后,该化合物可转化为所需的哌啶衍生物。对于第二种哌啶方法,将α-酮黄药添加到14型烯烃中会导致1,2-芳基迁移,导致产生α,β-不饱和酯,该酯可通过氨或伯胺和氰基硼氢化钠的作用转化为哌啶。取代的3-芳基吡咯烷可以通过简单地以α-酰胺基取代的黄药开始而获得。