N-tosyl vinylaziridines toward arynes has been demonstrated under mild and transition-metal-free conditions to yield 2-(phenanthren-9-yl)ethan-1-sulfamides in moderate to good yields. The selective synthesis of N-H and N-aryl products was accomplished using CsF in MeCN and KF/18-C-6 in 1,4-dioxane, respectively. This cascade process involves a sequential Diels-Alder reaction, ring-opening aromatization
A convenient synthesis of α-(aziridin-2-yl)-α-(trifluoromethyl) alcohols starting with ethyl aziridine-2-carboxylates is reported. Grignard reaction with the corresponding Weinreb amides led to aziridin-2-yl ketones, and subsequent treatment with Ruppert-Prakash reagent gave the trimethylsilylated target compounds as mixtures of diastereoisomers, which were desilylated with TBAF. In the case of ethyl
Synthesis of 1,2,5- and 1,2,3,5-substituted pyrroles from substituted aziridines via Ag(I)-catalyzed intramolecular cyclization
作者:Jun Hee Kim、Sang Bin Lee、Won Koo Lee、Doo-Ha Yoon、Hyun-Joon Ha
DOI:10.1016/j.tet.2011.02.072
日期:2011.5
An efficient synthesis of 1,2,5- and 1,2,3,5-substituted pyrroles has been achieved from the sequential reactions including a ring-opening of 1-(aziridin-2-yl)propargylic alcohols by various nucleophiles under mild condition followed by an intramolecular cyclization using Ag(I) catalyst. (C) 2011 Published by Elsevier Ltd.