Regioselective Simmons–Smith-type cyclopropanations of polyalkenes enabled by transition metal catalysis
作者:Jacob Werth、Christopher Uyeda
DOI:10.1039/c7sc04861k
日期:——
A cobalt catalyst imparts a high degree of regioselectivity in the reductive cyclopropanation of polyalkenes.
一种钴催化剂在多烯的还原环丙烷化反应中赋予高度的位置选择性。
Reaction of diazoalkanes with unsaturated compounds Communication 1. Cyclopropanation of olefins with diazomethane in the presence of copper compounds
作者:O. M. Nefodov、I. E. Dolgii、Yu. V. Tomilov、V. G. Bordakov
DOI:10.1007/bf00956238
日期:1984.1
Synthesis of Polycyclic Hydrocarbons Containing Cyclopropyl Groups<sup>1</sup>
作者:STANLEY D. KOCH、ROBERT M. KLISS、DOLORES V. LOPIEKES、ROBERT J. WINEMAN
DOI:10.1021/jo01067a019
日期:1961.9
Regioselectivity and solvent effects in cyclopropanation of alkadienes
作者:Edwin C. Friedrich、Fatemeh Niyati-Shirkhodaee
DOI:10.1021/jo00006a044
日期:1991.3
A comparison of the regioselectivities for monocyclopropanation of limonene and 4-vinylclohexene using diiodomethane with zinc dust and copper(I) chloride in ether, with diethylzinc in toluene, or with triethylaluminum in toluene-dichloromethane has been carried out. Some studies were also done using dibromomethane with zinc dust and copper(I) chloride in ether. The procedure using diethylzinc in toluene exhibited the least steric hindrance toward cyclopropanation at more highly substituted, electron-rich double bonds. In a study of solvent effects on the diiodomethane, zinc dust, and copper(I) chloride procedure, use of diisopropyl ether as a reaction solvent proved to be a satisfactory method for almost doubling the steric requirements of the cyclopropanating reagent.
Reaction of diazoalkanes with unsaturated compounds. Communication 2. Cyclopropanation of olefins by diazomethane in the presence of palladium compounds
作者:Yu. V. Tomilov、V. G. Bordakov、I. E. Dolgii、O. M. Nefedov