Catalytic, enantioselective alkylations of N,O- and N, N-acetals and hemiacetals
作者:Dana Ferraris、Brandon Young、Travis Dudding、William J. Drury、Thomas Lectka
DOI:10.1016/s0040-4020(99)00450-0
日期:1999.7
We report the first examples of catalytic, enantioselective alkylation of N,O-acetals to produce useful amino acid derivatives 5 in high yield (73–93%) and enantioselectivity (70–96%). We have extended the utility of our reaction to include a simple one-pot procedure from readily available starting materials. We also provide several different N-based protecting groups that greatly increase the flexibility
Catalytic enantioselective ene reactions of imines: a simple approach for the formation of optically active α-amino acids
作者:Sulan Yao、Xiangming Fang、Karl Anker Jørgensen
DOI:10.1039/a808019d
日期:——
A highly enantioselective ene reaction of readily available tosyl α-imino esters with alkenes catalysed by only 0.1 mol% of chiral CuPF6âBINAP complexes is presented.