A CHEMICAL, SPECTROSCOPIC, AND THEORETICAL ASSESSMENT OF THE LEWIS ACIDITY OF LICLO4 IN DIETHYL-ETHER

被引:51
作者
PAGNI, RM
KABALKA, GW
BAINS, S
PLESCO, M
WILSON, J
BARTMESS, J
机构
[1] Department of Chemistry, University of Tennessee, Knoxville
关键词
D O I
10.1021/jo00063a037
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Moderate diastereoselectivity is observed in the reaction of cyclopentadiene with dimethyl maleate and optically active dimenthyl fumarate in LiClO4/diethyl ether. Moderate regioselectivity is also seen in the reaction of isoprene and methyl acrylate in the same medium. NMR experiments and MNDO calculations, in conjunction with published work on Li+ in the gas phase, demonstrate that the strong, intrinsic Lewis acidity of Li+ is moderated in ether by complexation to the solvent and the counterion.
引用
收藏
页码:3130 / 3133
页数:4
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