An Ireland−Claisen Approach to β-Alkoxy α-Amino Acids
作者:James P. Tellam、Gabriele Kociok-Köhn、David R. Carbery
DOI:10.1021/ol802169j
日期:2008.11.20
A diastereoselective Ireland-Claisen approach to beta-alkoxy alpha-amino acid esters is reported. Amino acid esters of enol ethereal allylic alcohols undergo facile syn-selective [3,3]-sigmatropic rearrangement via silyl keteneacetals. Substrate synthesis, rearrangement development, stereoselectivity, and product elaboration are discussed.
Rhodium-Catalyzed Double 1,4-Addition of Arylboronic Acids to β-Aryloxyacrylates Involving β-Oxygen Elimination
作者:Takanori Matsuda、Shigeru Shiose、Yuya Suda
DOI:10.1002/adsc.201100253
日期:2011.8
The rhodium-catalyzed addition reaction of arylboronicacids to β-aryloxyacrylates gives 3,3-diarylpropanoates in good yields. The double arylation reaction proceeds via the intermediate cinnamates generated by β-oxygenelimination.