Tetrahedron

Friedel-crafts cyclisation—VI11Part VJM Allen, KM Johnston and RG Shotter, Chem. & Ind. 108 (1976).: Polyphosphoric acid-catalysed reactions of crotonophenones …

JM Allen, KM Johnston, JF Jones, RG Shotter

Index: Allen,J.M. et al. Tetrahedron, 1977 , vol. 33, p. 2083 - 2087

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Citation Number: 20

Abstract

Polyphosphoric acid-catalysed cyclisation of derivatives of crotonophenone and chalcone is shown to be a general reaction which occurs without migration of aryl substituents evident with other Friedel-Crafts catalysts. Two other reactions, however, may intervene: hydrogenation and α-carbonyl cleavage. Thus 4-bromochalcone gives 3-(p-bromophenyl)-1- phenylpropan-1-one, 3-(p-bromophenyl) indan-1-one and some benzole acid. A ...