Two-Step Route to Indoles and Analogues from Haloarenes: A Variation on the Fischer Indole Synthesis
作者:Martyn Inman、Anna Carbone、Christopher J. Moody
DOI:10.1021/jo201866c
日期:2012.2.3
In a new variation on the Fischer indole synthesis, readily available haloarenes are converted into a wide range of indoles in just two steps by halogen–magnesium exchange and quenching with di-tert-butyl azodicarboxylate, followed by reaction with aldehydes or ketones under acidic conditions. The protocol, which is readily extended to the preparation of indole isosteres, 4- and 6-azaindoles and thienopyrroles
在Fischer吲哚合成的新变化中,通过卤素-镁交换并用偶氮二羧酸二叔丁酯淬灭,然后在酸性条件下与醛或酮反应,仅需两步即可将现成的卤代芳烃转化为多种吲哚。。该方案易于扩展到吲哚等位异构体,4-和6-氮杂吲哚和噻吩并吡咯的制备,从而避免了制备潜在有毒的芳基肼的需要,同时避免了不需要的苯胺,例如萘胺。