Synthesis of (2<i>S</i>,3<i>R</i>,4<i>S</i>)-Isonorstatine Using a Solvent-Induced Highly Stereoselective 3-Butenyl Addition to <scp>l</scp>-Threose Imines
作者:Volker Jäger、Feng Li、Oliver Schwardt
DOI:10.1055/s-2006-942426
日期:2006.7
Isonorstatine was obtained in an 11-step sequence start- ing from L-tartaric acid, based on a highly stereoselective addition of 1-butene-3-yl to a threose imine. The orientation of the methyl group at C-4 of isonorstatine was determined by transformation of the key d-xylo adduct into a d-lactone. This also shows that both ter- mini of the key adduct, the diol acetonide and vinyl moiety, can be elaborated