Polyphosphoric Acid Promoted Synthesis of 10,11-Dihydrobenzo[<i>j</i>]fluoranthen-12-one
作者:Meng-Yang Chang、Tein-Wei Lee、Ming-Hao Wu
DOI:10.1021/ol3006979
日期:2012.5.4
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.
据报道,通过双克莱森重排的转化,由联苯-4,4'-二醇2以七步路线直接合成了3,8-二甲氧基-10,11-二氢苯并[ j ]荧蒽-12-酮1。,与丙烯酸乙酯和多磷酸(PPA)促进的Friedel–Crafts亲电苯环化交叉复分解反应,收率良好。