Organic letters

Polyphosphoric Acid Promoted Synthesis of 10, 11-Dihydrobenzo [j] fluoranthen-12-one

MY Chang, TW Lee, MH Wu

Index: Chang, Meng-Yang; Lee, Tein-Wei; Wu, Ming-Hao Organic Letters, 2012 , vol. 14, # 9 p. 2198 - 2201

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Citation Number: 8

Abstract

A straightforward synthesis of 3, 8-dimethoxy-10, 11-dihydrobenzo [j] fluoranthen-12-ones 1 is reported in a seven-step route from biphenyl-4, 4′-diol 2 via the transformation of a double Claisen rearrangement, cross metathesis with ethyl acrylate, and polyphosphoric acid (PPA)-promoted Friedel–Crafts electrophilic benzannulation in good yields.