Facile Syntheses of 1,8-Bis(diphenylphosphino)anthracene and 1,8-Bis(dimethylamino)anthracene by Nucleophilic Substitution of 1,8-Difluoroanthracene
作者:Matthias W. Haenel、Stephan Oevers、Joachim Bruckmann、Jörg Kuhnigk、Carl Krüger
DOI:10.1055/s-1998-1627
日期:1998.3
1,8-Bis(diphenylphosphino)anthracene (1) was prepared in a three-step synthesis in 51% overall yield starting from 1,8-dichloro-9,10-anthraquinone (8). Compound 8 was converted by chlorine-fluorine exchange and reduction with zinc into 1,8-difluoroanthracene (7) from which 1 was obtained by reaction with potassium 1,8-bis(dimethylamino)anthracene (10) clearly showed that in the case of 7 direct nucleophilic displacement (addition-elimination mechanism) dominates over aryne formation (elimination-addition mechanism). Single crystal X-ray structure analyses are reported for 1 and 10.
以 1,8-二氯-9,10-蒽醌 (8) 为原料,通过三步合成制备了 1,8-双(二苯基膦)蒽 (1),总产率为 51%。化合物8通过氯-氟交换并用锌还原转化为1,8-二氟蒽(7),其中1通过与1,8-双(二甲氨基)蒽钾(10)反应得到,清楚地表明在7 直接亲核置换(加成-消除机制)主导芳炔形成(消除-加成机制)。报道了 1 和 10 的单晶 X 射线结构分析。