Stereospecific synthesis of unsymmetrical (E)- and (Z)-1,2-difluorostilbenes
作者:Chongsoo Lim、Yi Wang、Donald J. Burton
DOI:10.1016/j.jfluchem.2016.01.018
日期:2016.5
(Z)-1-chloro-1,2-difluorostyrenes stereospecifically gave the 1,2-difluorostilbenes in moderate to excellent yields. We investigated 4 protocols for the reaction. Protocols 2 and 3 were recommended for scale up, since the chlorostyrene starting material can be obtained in large quantities stereospecifically as described in previous reports. This work represents the first practical synthesis of unsymmetrical (E)-