A class of bifunctional phosphinothioureas derived from saccharide was developed as new organocatalysts for the enantioselective Morita‐Baylis‐Hillman reaction between acrylates and aldehydes. With 10 mol% of glucose‐based phosphinothiourea 1d, the allylic alcohols were obtained in up to 96% yield and 83% ee under mild reaction conditions.
Valine-derived phosphinothiourea as organocatalyst in enantioselective Morita–Baylis–Hillman reactions of acrylates with aromatic aldehydes
作者:Jing-Jing Gong、Kui Yuan、Xin-Yan Wu
DOI:10.1016/j.tetasy.2009.07.047
日期:2009.9
A new type of chiral bifunctional phosphinothiourea derived from L-valine is synthesized and used as an organocatalyst in the enantioselective Monta-Baylis-Hillman reaction of aromatic aldehydes with acrylates. The desired products were obtained in good enantioselectivities (up to :33% ee) and in excellent yields (up to 96%) under mild reaction conditions. (C) 2009 Elsevier Ltd All rights reserved