Tetrahedron

Processus concurrents de photoisomerisation d'hexatrienes polymethyles: effet de longueur d'one

P Courtot, R Rumin

Index: Courtot,P.; Rumin,R. Tetrahedron, 1976 , vol. 32, p. 441 - 446

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Citation Number: 10

Abstract

The ground-state conformer composition is shown to play a determining role in the orientation of the photochemical reactions of two hexatrienes. A pronounced wavelength effect is observed for Z-2, 6-dimethyl-1, 3, 5-heptatriene; photocycloaddition leads to a bicyclo [3.1. 0] hexene and [1, 5] sigmatropic hydrogen migration occurs from an s-cis-s- trans conformation preferentially excited by longer wavelength light, whereas the ZE ...