Tetrahedron

The photo-reductions of β-ketophosphonates in ethyl ether

H Tomioka, Y Izawa, Y Ogata

Index: Tomioka,H. et al. Tetrahedron, 1969 , vol. 25, p. 1501 - 1506

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Citation Number: 2

Abstract

The photo-reductions of dialkyl β-ketophosphonates and ethyl acetoacetate have been studied in detail. β-Ketophosphonates have been found to be photo-reduced efficiently to form corresponding β-hydroxyphosphonates, the quantum yields for disappearance of ketones being 0· 6− 0· 7. By quenching experiments with piperylene, values for bimolecular hydrogen abstraction rate constants (kr) by triplet β-keto esters have been estimated. High ...