Tetrahedron letters

Photochemistry of macrocyclic ketones within zeolites: competition between norrish type I and type II reactivity

V Ramamurthy, XG Lei, NJ Turro, TJ Lewis…

Index: Ramamurthy; Lei, Xue-Gong; Turro, Nicholas J.; Lewis, Thillairaj J.; Scheffer, John R. Tetrahedron Letters, 1991 , vol. 32, # 52 p. 7675 - 7678

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Citation Number: 18

Abstract

Abstract Photolysis of macrocyclic mono-and diketones (1 and 2) included in X and Y zeolites gives Norrish type I products in addition to the products obtained via the Norrish type II process, the only observed process in isotropic media. Enhancement of the type I over the type II process is cation-dependent and especially large enhancements are obtained with Li and Na as cations. The zeolite effect is attributed to a reduction in the rate of the ...