Synthesis of Enantiopure 3-Hydroxypiperidines from Sulfinyl Dienyl Amines by Diastereoselective Intramolecular Cyclization and [2,3]-Sigmatropic Rearrangement
作者:Carmen Simal、Robert H. Bates、Mercedes Ureña、Irene Giménez、Christina Koutsou、Lourdes Infantes、Roberto Fernández de la Pradilla、Alma Viso
DOI:10.1021/acs.joc.5b01307
日期:2015.8.7
novel sulfinyl tetrahydropyridines that are readily converted to 3-hydroxy tetrahydropyridines via sigmatropic rearrangement. The influence of N- and C- substituents on the process has been studied. Procedures to shorten the sequence such as the tandem cyclization followed by [2,3]-sigmatropic rearrangement, as well as cyclization of the free amine, under Boc- or ArSO- deprotection conditions have been
多种对映体纯的亚磺酰基二烯基胺的高度非对映选择性的碱促进的分子内环化作用提供了新颖的亚磺酰基四氢吡啶,其易于通过σ重排转化为3-羟基四氢吡啶。已经研究了N-和C-取代基对该方法的影响。在Boc-或ArSO-脱保护条件下,已经研究了缩短序列的程序,例如串联环化,然后进行[2,3]-σ重排,以及游离胺的环化。对于所报道的转化,通常观察到良好至优异的选择性水平(dr:75/25至> 98/2)。还报道了访问取代的氨基二烯亚砜的新方案。