Lewis acid catalysis of photochemical reactions. 4. Selective isomerization of cinnamic esters

…, JD Oxman, LL Gibson, HL Hampsch…

Index: Lewis, Frederick D.; Oxman, Joe D.; Gibson, Lester L.; Hampsch, Hilary L.; Quillen, Suzanne L. Journal of the American Chemical Society, 1986 , vol. 108, # 11 p. 3005 - 3015

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Citation Number: 47

Abstract

Abstract: The spectroscopic properties and photoisomerization reactions of several (E)-and (Z)-cinnamic esters, bis cinnamic esters, and model esters and lactones in the presence and absence of Lewis acids have been investigated. The use of Lewis acids such as BF3 or EtA1CI2 results in enhanced photoisomerization efficiency and a shift in the photoequilibrium toward the thermodynamically less stable Z isomer. Enhanced EZ ...

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