有机化学 ›› 1988, Vol. 8 ›› Issue (2): 134-138. 上一篇    下一篇

研究论文

用^1H NMR法研究以CpTiCl3-LiAlH4为还原剂的pinacol反应的立体选择性

刘兴平;潘鑫复;李裕林;梁晓天   

  1. 兰州大学有机化学研究所;中国医学科学院药物研究所
  • 发布日期:1988-04-25

The stereoselectivity of some pinacol reaction with CpTiCl3-LiAlH4 as the reductive coupling agent

LIU XINGPING;PAN XINFU;LI YULIN;LIANG XIAOTIAN   

  • Published:1988-04-25

以CpTiCl3-LiAlH4为还原偶合剂研究了四组醛的Pinacol反应.阐明了邻二仲醇化合物的立体选择性, 并研究了由HNMR推定邻二仲醇化合物中赤、苏式异构体比例的方法.苏式异构体为主要产品.

关键词: 氯化物, 环戊二烯, 质子磁共振谱法, 立体选择性, 醛, 钛络合物, 还原剂, 缩醛, 频那醇重排, 碳酸酯, 氢化锂铝

The 1H NMR spectra of cyclic carbonates and acetals of secondary-secondary glycolic systems can be used to estimate the ratio of erythro and threo isomers. The pinacols from four groups of achiral aldehydes with CpTiCl3-LiAlH4 as the reductive coupling agent were examined The threo isomers were found to be the major products.

Key words: CHLORIDE, CYCLOPENTADIENE, PROTON MAGNETIC RESONANCE SPECTROMETRY, STEREOSELECTIVITY, ALDEHYDES, TITANIUM COMPLEX, REDUCER, ACETAL, PINACOL REARRANGEMENT, POLYCARBONATE, LITHIUM ALUMINIUM HYDRIDE

中图分类号: