An Approach to the Selenobromination of Aryl(thienyl)alkynes: Access to 3-Bromobenzo[<i>b</i>]selenophenes and Selenophenothiophenes
作者:Edgars Paegle、Sergey Belyakov、Pavel Arsenyan
DOI:10.1002/ejoc.201402095
日期:2014.6
A novel approach for the cyclization of arylalkynes with selenium(IV) bromide prepared in situ has been elaborated. The use of an alkene additive as a bromine scavenger provides a convenient synthetic pathway for the synthesis of a wide variety of 3-bromobenzo[b]selenophenes. Reactions can be performed open to air without the use of moisture-sensitive reagents, anhydrous solvents, or an inert atmosphere
详细阐述了一种用原位制备的溴化硒 (IV) 环化芳炔的新方法。使用烯烃添加剂作为溴清除剂为合成各种 3-溴苯并 [b] 硒酚提供了方便的合成途径。反应可以在空气中进行,无需使用对湿气敏感的试剂、无水溶剂或惰性气氛。乙炔基噻吩的硒溴化作用已用于制备硒酚[3,2-b]-和硒酚[2,3-b]噻吩。代表性衍生物的分子结构已通过 X 射线晶体学分析得到证实。
Selenium analogues of raloxifene as promising antiproliferative agents in treatment of breast cancer
Synthetic protocols for the preparation of selenium analogues of raloxifene were elaborated. General aim of the current research is to improve the positive impact of selenium atom introduction in drug design. Antiproliferative activity on CCL-8 (mouse sarcoma), MDA-MB-435s (human melanoma), MES-SA (human uterus sarcoma), MCF-7 (human breast adenocarcinoma), HT-1080 (human fibrosarcoma), MG-22A (mouse hepatoma) tumor cell lines, and normal cell line NIH 3T3 (mouse fibroblasts) was studied. Influence of aminoethoxy "tail" and benzoyl group position on SAR was discussed. Results of in vivo studies on BALB/c female mice with 411 cell induced breast cancer model showed that selenium analogue of raloxifene is able to suppress estrogen-depending tumor growth. (C) 2014 Elsevier Masson SAS. All rights reserved.