Using Heteroaryl-lithium Reagents as Hydroxycarbonyl Anion Equivalents in Conjugate Addition Reactions with (<i>S</i>,<i>S</i>)-(+)-Pseudoephedrine as Chiral Auxiliary; Enantioselective Synthesis of 3-Substituted Pyrrolidines
作者:Beatriz Alonso、Marta Ocejo、Luisa Carrillo、Jose L. Vicario、Efraim Reyes、Uxue Uria
DOI:10.1021/jo302438k
日期:2013.1.18
of hydroxycarbonyl anion equivalents to α,β-unsaturated carboxylic acid derivatives using (S,S)-(+)-pseudoephedrine as chiral auxiliary, making use of the synthetic equivalence between the heteroaryl moieties and the carboxylate group. This protocol has been applied as key step in the enantioselectivesynthesis of 3-substituted pyrrolidines in which, after removing the chiral auxiliary, the heteroaryl