作者:Alexey V Shastin、Vasily N Korotchenko、Valentine G Nenajdenko、Elisabeth S Balenkova
DOI:10.1016/s0040-4020(00)00606-2
日期:2000.8
We found that N-unsubstituted hydrazones of aromatic aldehydes can be easily converted to the corresponding 1,1-dichlorostyrenes in the reaction with carbontetrachloride using copper (I) chloride as catalyst. Factors affecting the route of the reaction and yields of the products were investigated. A proposed mechanism for the reaction is discussed.
Carbontetrachloride is no longer used as a common solvent due to its toxicity and harmful environmental impact. The synthesis of gem-dichloroalkenes from aldehydes by using triphenylphosphine typically requires carbontetrachloride as a solvent. We report that stoichiometric bromotrichloromethane in acetonitrile can be used in place of solvent quantities of carbontetrachloride in this transformation
作者:V. G. Nenajdenko、A. V. Shastin、V. N. Korotchenko、E. S. Balenkova
DOI:10.1023/a:1011377504491
日期:——
A new general one-pot preparative method for the synthesis of 1-aryl(hetaryl)-2,2-dichloroethenes from aldehydes was developed. The method involves successive conversions of the latter into hydrazones followed by treatment with carbon tetrachloride in the presence of copper(I) chloride.
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.
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