β-(Carbonatoxy)alkyl radicals: a new subset of β-(ester)alkyl radical fragmentation during copper(I)-mediated synthesis of 1,1-dichloro-1-alkenes
作者:Ram N. Ram、Ram K. Tittal
DOI:10.1016/j.tetlet.2014.05.097
日期:2014.7
A new subset of β-(ester)alkyl radicals is presented. It is the first study on the chemistry of β-(alkoxycarbonyloxy)alkyl radicals that fill the gap in the spectrum of the migrating groups in β-(ester)alkyl radical reactions. The change from less nucleofugal (acetate) group to the more nucleofugal (carbonate) group in the spectrum of the migrating group changed the reaction path from rearrangement
Synthesis of 2,4-disubstituted 3-chlorofurans and the effect of the chlorine substituent in furan Diels–Alder reactions
作者:Ram N. Ram、Neeraj Kumar
DOI:10.1016/j.tetlet.2007.11.193
日期:2008.1
3-chlorofurans were synthesized in 42–69% overall yields by CuCl/bpy-catalyzed halogen atom transfer radical cyclization of 1-substituted 2,2,2-trichloroethyl allyl ethers to 2-substituted 3,3-dichloro-4-(1-chloroalkyl)tetrahydrofurans followed by base promoted dehydrochlorination. Diels–Alderreactions of 4-substituted 2-(2-furyl)-, 2-styryl-, and 2-crotyl-3-chlorofurans with dimethyl acetylenedicarboxylate
SmI2-mediated elimination reaction of trichloromethyl carbinols: a facile method to synthesize vinyl dichlorides
作者:Jian Li、Xiaoliang Xu、Yongmin Zhang
DOI:10.1016/j.tetlet.2003.10.085
日期:2003.12
Samarium diiodide-mediated elimination reaction provides a simple and general method to synthesize vinyl dichlorides from trichloromethyl carbinols directly in good to excellent yields. (C) 2003 Elsevier Ltd. All rights reserved.