Reductive conversion of 1-aryl-3-hydroxymethyl-3,4-dihydro-2-naphthoic acid lactones into substituted tetrahydro-1H-cyclopropa[a]naphthalenes
作者:L. H. Klemm、D. Hsu Lee、P. S. Santhanam、D. V. White、J. Shabtai、D. R. Olson
DOI:10.1021/jo00977a043
日期:1972.6
Asymmetric Simmons−Smith Cyclopropanation of Unfunctionalized Olefins
作者:Jiang Long、Yi Yuan、Yian Shi
DOI:10.1021/ja030488e
日期:2003.11.1
This paper describes a promising asymmetric cyclopropanation system for unfunctionalized olefins using readily available dipeptide N-Boc-l-Val-l-Pro-OMe as ligand.
Mechanistic Studies on a Dipeptide-Promoted Asymmetric Cyclopropanation of Unfunctionalized Olefins
作者:Jiang Long、Liang Xu、Haifeng Du、Kai Li、Yian Shi
DOI:10.1021/ol902150j
日期:2009.11.19
This paper describes mechanistic studies on a dipeptide-promoted asymmetric cyclopropanation system for unfunctionalized olefins. Zinc species generated from the deprotonation of the N-H of the dipeptide ligand have been investigated by NMR and X-ray structure studies and are likely to be responsible for asymmetric cyclopropanation. ZnI2 plays an important role in promoting the reaction.