Lewis acid catalysis of photochemical reactions. 7. Photodimerization and cross-cycloaddition of cinnamic esters
作者:Frederick D. Lewis、Suzanne L. Quillen、Paul D. Hale、Joe D. Oxman
DOI:10.1021/ja00212a039
日期:1988.2
cases the Lewisacid complexes dimerize more efficiently and stereoselectively than the free esters. Photodimerization and cross-cycloaddition of methyl cinnamate in dilute solution is also catalyzed by Lewisacids. The mechanism of these reactions involves electronic excitation of a ground-state ester (dimerization) or simple olefin (cross cycloaddition). The catalytic effect of Lewisacids is attributed