Synthesis, Structure and Photoreactivity of Several Cinnamophane Vinylogs
作者:Helmut Greiving、Henning Hopf、Peter G. Jones、Peter Bubenitschek、Jean-Pierre Desvergne、Henri Bouas-Laurent
DOI:10.1002/ejoc.200400592
日期:2005.2
intramolecular cyclobutane photocycloadduct with stereospecificity and very high efficiency, following the topochemical rule observed in the solid state. Here are reported the synthesis and X-ray structure determination of their vinylogs 5a–d. The photoreactivity of the pseudo-gem isomer 5a was especially investigated in order to examine whether the same specificity would be maintained for the longer dienic