Benzotriazole-assisted β-lithiation of vinyl ethers
摘要:
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.
Benzotriazole-assisted β-lithiation of vinyl ethers
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.
Katritzky Alan R., Ignatchenko Alexey V., Lan Xiangfu, Lang Hengyuan, Ste+, Tetrahedron, 50 (1994) N 20, S 6005-6016
作者:Katritzky Alan R., Ignatchenko Alexey V., Lan Xiangfu, Lang Hengyuan, Ste+