Palladium-Catalyzed Cascade Saegusa-Heck Reaction: Synthesis of β,β-Diarylacroleins from Arylpropanals and Aryl Iodides
作者:Li Xiao、Yilin Zheng、Qiong Xie、Liming Shao
DOI:10.1002/ejoc.201701025
日期:2017.10.25
An efficient Pd-catalyzed Saegusa–Heck cascade protocol for the preparation of synthetically useful β,β-diarylacroleins in moderate to high yields (30–83 %) from arylpropanals and aryl iodides is developed.
Chiral dihydrobenzo[1,4]oxazines as catalysts for the asymmetric transfer-hydrogenation of α,β-unsaturated aldehydes
作者:Christian Ebner、Andreas Pfaltz
DOI:10.1016/j.tet.2011.10.051
日期:2011.12
A new class of organocatalysts based on the structure of 2,3-dihydrobenzo[1,4]oxazine was prepared and applied in the enantioselective transfer-hydrogenation of α,β-unsaturatedaldehydes with Hantzsch ester as hydride donor. These catalysts proved to be particularly effective for the conjugate reduction of β,β-diaryl-substituted acrylaldehydes leading to saturated aldehydes bearing a stereogenic center