Synthesis of 1,2,3-Trisubstituted Pyrrolidines and 2,3-Disubstituted Tetrahydrofurans via Diastereoselective Reductive Cyclization of γ-Chloroimines and γ-Chloroketones
作者:Norbert De Kimpe、Mudiganti Sastry、Sven Mangelinckx、Bart Lucas
DOI:10.1055/s-0031-1289544
日期:2011.12
involves reductive cyclization of gamma-chloroketimines, which were generated in situ from the reaction of 3-substituted 5-chloro-2-pentanones and a primaryamine. Various reduction conditions were explored to induce a diastereoselective reductive cyclization. 2,3-Disubstituted tetrahydrofurans were obtained by the direct reduction of 3-substituted 5-chloro-2-pentanones with sodiumborohydride.