A rapid and efficient synthesis of a new pyrrolobenzodiazocines via an intramolecular Friedel–Crafts reaction
作者:Samir BouzBouz、Morgane Sanselme
DOI:10.1016/j.tetlet.2009.07.145
日期:2009.10
New pyrrolobenzodiazocines 3 have been prepared by an intramolecular Friedel–Crafts process from pyrrolobenzoacrylamides 2. The cyclisation process involving a 1,4-intramolecular addition of a pyrrole onto acrylamide led to the formation of an eight-membered ring.
Expeditious Synthesis of Imidazole- and Pyrrole-Fused Benzodiazocines
作者:Amita Mishra、Sanjay Batra
DOI:10.1002/ejoc.201000355
日期:2010.9
A straightforward strategy for the synthesis of imidazole-fused benzodiazocine from 1-(2-nitrophenyl)-1H-imidazole-2-carbaldehyde via Morita–Baylis–Hillman reaction followed by reductive intramolecular cyclization is described. Alternatively the Horner–Wadsworth–Emmons reaction of this substrate with triethyl phosphonoacetate yielded (E)-ethyl 3-(1-(2-nitrophenyl)-1H-imidazol-2-yl)acrylate which upon