Lewis Acid-Catalyzed Ring-Opening Reactions of Methylenecyclopropanes with Alcoholic or Acidic Nucleophiles
作者:Min Shi、Bo Xu
DOI:10.1021/ol0259544
日期:2002.6.1
[reaction: see text] Methylenecyclopropanes can react with various nucleophiles such as alcohols, phenols, carboxylic acids, and thiols to give the corresponding homoallylic esters or ethers in good yields with good stereoselectivities in the presence of Lewis acids.
Lewis acids catalyzed ring-opening reactions of methylenecyclopropanes and epoxides in supercritical carbon dioxide or modified supercritical carbon dioxide with perfluorocarbon
作者:Min Shi、Yu Chen
DOI:10.1016/s0022-1139(03)00083-6
日期:2003.8
The reactions of methylenecyclopropanes (MCPs) and epoxides with alcohols and aromatic amines can be carried out in supercritical carbon dioxide (scCO(2)) or modified scCO(2) with perfluorocarbon which offer a way to synthesize various alcohols, amino-alcohols, homoallylic ethers, and amines under an environmentally benign condition. (C) 2003 Elsevier Science B.V. All rights reserved.
Kinetics and Equilibrium Constants for Reactions of α-Phenyl-Substituted Cyclopropylcarbinyl Radicals
作者:Thomas A. Halgren、John D. Roberts、John H. Horner、Felix N. Martinez、Christopher Tronche、Martin Newcomb
DOI:10.1021/ja991114h
日期:2000.4.1
cyclopropylcarbinyl radicals were calculated. The cyclization reactions of 2 and 5 are strongly enthalpy controlled. Production of radicals 1 and 2 from the corresponding tert-butylperoxy esters in the presence of Et3SnH gave diphenylcyclopropylmethane and 1,1-diphenyl-1-butene from H-atom trapping of radicals 1 and 2 and 4-phenyl-1,2-dihydronaphthalene which derives from the product radical formed by addition