1-Pyrrolidin-1-ylbuta-1,3-dienes as potential 1,5-dipoles; synthesis of pyrrolizines
作者:Germ W. Visser、Willem Verboom、Piet H. Benders、David N. Reinhoudt
DOI:10.1039/c39820000669
日期:——
Teutomerization of 1-pyrrolidin-1-ylbuta-1,3-dienes and (hetero)aromatic compounds formally containing this moiety, to the corresponding 1,5-dipoles by a concerted [1,6] hydrogen shift is followed by a 1,5-electrocyclization to give pyrrolizine derivatives.
Synergistic methodologies for the synthesis of 3-aroyl-2-arylbenzo[b]thiophene-based selective estrogen receptor modulators. Two concise syntheses of raloxifene
作者:David A. Bradley、Alexander G. Godfrey、Christopher R. Schmid
DOI:10.1016/s0040-4039(99)00955-7
日期:1999.7
Difunctionalized benzo[b] thiophene intermediates are prepared which allow fully independent elaboration of the 2-aryl position or the tether position of benzo[b]thiophene-based selective estrogen receptor modulators (SERMs). Two concise syntheses of the SERM raloxifene (Evista(R)) are presented. (C) 1999 Elsevier Science Ltd. All rights reserved.
A Convenient Approach to 2-Aminobenzo[b]chalcogenophenes Based on Copper-Catalyzed Transformation of 4-(2-Bromophenyl)-1,2,3-chalcogenodiazoles in the Presence of a Base and Amines
作者:E. A. Popova、A. G. Lyapunova、M. L. Petrov、T. L. Panikorovskii、D. A. Androsov
DOI:10.1134/s1070363218040126
日期:2018.4
The reactions of 4-(2-bromophenyl)-1,2,3-thia-and -selenadiazoles with amines in the presence of potassium carbonate and copper(I) iodide afforded 2-aminobenzo[b]chalcogenophenes. The corresponding thiaand selenamides, prepared by interaction of 4-(2-bromophenyl)-1,2,3-thia- and -selenadiazoles with amines in the absence of copper salt, were transformed into 2-aminobenzo[b]chalcogenophenes by the action of potassium carbonate and copper(I) iodide in DMF in different yields.
New HIV-1 reverse transcriptase inhibitors based on a tricyclic benzothiophene scaffold: Synthesis, resolution, and inhibitory activity
作者:Krzysztof Krajewski、Yijun Zhang、Damon Parrish、Jeffrey Deschamps、Peter P. Roller、Vinay K. Pathak
DOI:10.1016/j.bmcl.2006.02.049
日期:2006.6
We synthesized, separated into enantiomers, and tested for the HIV-1 reverse transcriptase inhibitory activity a group Of analogs of dimethyl-1-(1-piperidynyl)cyclobuta[b][1]benzothiophene-2,2a(7bH)-dicarboxylate (NSC-380292). Absolute configurations of the enantiomers were determined based on absolute X-ray structures and analysis of CD spectra. Within pairs of enantiomers the (R,R)-enantiomer was always much more potent HIV-1 reverse transcriptase inhibitor. (c) 2006 Elsevier Ltd. All rights reserved.
In situ generation of 1,5-dipoles by concerted [1,6] hydrogen transfer. Stereoselective thermal rearrangement of 1-(1-pyrrolidinyl)-1,3-butadienes to pyrrolizines
作者:David N. Reinhoudt、Germ W. Visser、Willem Verboom、Piet H. Benders、Marcel L. M. Pennings