作者:Alan R. Katritzky、Alexey V. Ignatchenko、Xiangfu Lan、Hengyuan Lang、Christian V. Stevens、Andreas Opitz、Rainer Koch、Ernst Anders
DOI:10.1016/s0040-4020(01)90453-3
日期:1994.1
Benzotriazole-assisted beta-deprotonation of (alpha-benzotriazolylvinyl) ethers occurs stereoselectively at the cis position as shown by quenching with a variety of electrophiles. Semiempirical calculations of the lithiated enol ethers by PM3 and MNDO methods disclosed a higher stabilization for the cis-isomers over the corresponding trans-isomers.