Regiospecific Synthesis of Benzo[<i>b</i>]fluorenones via Ring Contraction by Benzil-Benzilic Acid Rearrangement of Benz[<i>a</i>]anthracene-5,6-diones
作者:Dipakranjan Mal、Asit Patra、Sujit Ghorai、Saroj De
DOI:10.1055/s-2006-942468
日期:2006.8
A regiospecific route to benzo[b]fluorenones is described. The synthesis is based upon a one-pot, regiospecific benzannulation of 1,4-dipolar synthons with naphthoquinone monoketal and ring contraction of the generated benz[a]anthracene-5,6-diones through benzil-benzilic acid rearrangement.