Various aryl 1‐pyrryl sulfones were synthesized and tested as inhibitors of HIV‐1, 2‐Nitrophenyl‐2‐ethoxycarbonyl‐1‐pyrryl sulfone, the most active among test derivatives, was selected as lead compound of the aryl pyrryl sulfoneseries. The in vitro anti‐HIV‐1 activity and cytotoxicity of 41 compounds is reported. Some structure‐activity relationships are discussed also in comparison with the known
An acid-catalyzed [4+3] cycloaddition reaction of N-nosyl pyrroles with 2-(tert-butyldimethylsilyloxy)acrolein has been developed. The reaction of 2-(silyloxy)acrolein with N-nosyl pyrrole was catalyzed by Tf2NH, and a regio- and stereoselective reaction with 2-substituted N-nosyl pyrroles leading to tropinone derivatives possessing tetra-substituted carbon centers was also achieved. High regioselectivities
Regiocontrolled halogen dance of 2,5-dibromopyrroles using equilibrium between dibromopyrrolyllithiums
作者:Tatsuki Okumi、Atsunori Mori、Kentaro Okano
DOI:10.1039/d2cc06373e
日期:——
A regiocontrolled halogendance reaction of 2,5-dibromopyrroles is described. An N,N-dimethylsulfamoyl group on the pyrrole nitrogen was especially effective for facilitating interconversion of the resulting 2,3- and 2,4-dibromopyrrolyllithiums, rendering the smooth halogendance reaction. This method was applicable to the formal synthesis of atorvastatin.
Concise [4+3] cycloaddition reaction of pyrroles leading to tropinone derivatives
作者:Ryuichi Fuchigami、Kosuke Namba、Keiji Tanino
DOI:10.1016/j.tetlet.2012.07.130
日期:2012.10
A concise [4+3] cycloaddition reaction of pyrroles with 2-(silyloxy)allyl cations has been developed. The oxyallyl cations stabilized with a methylthio group or geminal methyl groups were generated from the corresponding allylic alcohols under the influence of a Bronsted acid (Tf2NH), respectively. The use of N-nosyl-protected pyrroles as the four-carbon unit was found to give tropinone derivatives in high yield. (C) 2012 Elsevier Ltd. All rights reserved.