The Photoisomerization of 1,2,3,4,5-Pentamethyl-5-vinyl-1,3-cyclopentadiene
作者:Ulrich Burger、Robert Etienne
DOI:10.1002/hlca.19840670805
日期:1984.12.19
3]0sigmatropic process to give the bicyclo[3.2.0]heptadiene skeleton 2. Based on the photochemicalbehaviour of selectively deuterated starting material, the suggestion is made that the direct photolysis produces the vinylhousene skeleton by a classic electrocyclization, whereas the sensitized reaction reaches the same target via a di-π-methane rearrangement. The bicyclo[3.2.0]heptadiene derivative 2 give