Copper(I) Halide Promoted Diastereoselective Synthesis of Chiral Propargylamines and Chiral Allenes using 2-Dialkylaminomethylpyrrolidine, Aldehydes, and 1-Alkynes
作者:Ramani Gurubrahamam、Mariappan Periasamy
DOI:10.1021/jo302534f
日期:2013.2.15
Copper bromide promoted reactions of aldehydes, 1-alkynes, and chiral 2-dialkylaminomethylpyrrolidine at 25 °C give the corresponding chiralpropargylamine derivatives in up to 96% yield and 99:1 dr that are readily converted to the corresponding disubstitued chiralallenes in up to 81% yield and 99% ee upon reaction with CuI in dioxane at 100 °C.