Chemistry of Heterocyclic Compounds p. 1096 - 1101 (1990)
Update date:2022-08-06
Topics:
Kirpichenok, M. A.
Yufit, D. S.
Mel'nikova, L. M.
Grandberg, I. I.
Struchkov, Yu. T.
Denisov, L. K.
The photoreactions of 7-diethylaminocoumarin, 4-methyl-7-diethylaminocoumarin, 4-trifluoromethyl-7-diethylaminocoumarin, and 4-N-morpholino-7-diethylaminocoumarin with trans,trans-1,4-diphenyl-1,3-butadiene, which lead to the formation of <2 + 2>-cycloaddition products, were studied.It was established that photocycloaddition proceeds with the formation of adducts that have a 1-endo-styryl substituent and a 2-exo-phenyl group.The effect of the substituent in the 4-position of the 7-aminocoumarin molecule on the effectiveness of cycloaddition is discussed.
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