Diastereo- and Enantioselective Alkylation of α-Imino Esters with Enol Silanes Catalyzed by (<i>R</i>)-Tol-BINAP−CuClO<sub>4</sub>·(MeCN)<sub>2</sub>
作者:Dana Ferraris、Brandon Young、Christopher Cox、William J. Drury、Travis Dudding、Thomas Lectka
DOI:10.1021/jo981079h
日期:1998.9.1
Catalytic, Enantioselective Alkylation of α-Imino Esters: The Synthesis of Nonnatural α-Amino Acid Derivatives
作者:Dana Ferraris、Brandon Young、Christopher Cox、Travis Dudding、William J. Drury、Lev Ryzhkov、Andrew E. Taggi、Thomas Lectka
DOI:10.1021/ja016838j
日期:2002.1.1
Methodology for the practical synthesis of nonnatural amino acids has been developed through the catalytic, asymmetric alkylation of α-imino esters and N,O-acetals by enol silanes, ketene acetals, alkenes, and allylsilanes using chiral transition metal-phosphine complexes as catalysts (1−5 mol %). The alkylation products, which are prepared with high enantioselectivity (up to 99% ee) and diastereoselectivity