Access to 2,3-diaryl-4-nitrothiochroman S,S-dioxides from 3-nitrobenzo[b]thiophene
作者:Lara Bianchi、Massimo Maccagno、Giovanni Petrillo、Egon Rizzato、Fernando Sancassan、Domenico Spinelli、Cinzia Tavani
DOI:10.1016/j.tet.2011.08.038
日期:2011.10
The base-induced cyclization of (E)-2-aryl-1-[2-(benzylsulfonyl)phenyl]-1-nitroethenes to poly-substituted thiochroman 5,S-dioxides exhibits a diastereoselectivity that can be oriented towards a selected isomer by means of appropriate adjustments of the experimental conditions. The interest of such a result also rests on the promising pharmacological activity of the products, whose structure encompasses different well-acknowledged pharmacophores. A conformational H-1 NMR investigation, backed by molecular-mechanics calculations, has also been accomplished. (C) 2011 Elsevier Ltd. All rights reserved.