Synthesis and biological evaluation of 1,1-Dichloro-2,3-diarylcyclopropanes as antitubulin and anti-breast cancer agents
摘要:
Z-1,1-Dichloro-2,3-diphenylcyclopropane (1) is an effective 'anti-breast cancer agent in rodents and in cell culture. We recently determined that 1 inhibits tubulin assembly in vitro. and causes microtubule loss in breast cancer cells, leading to accumulation in the G2/M portion of the cell cycle. Aryl ring-halogenated, methoxylated and benzyloxylated derivatives of 1, as well as its E-isomer and the dichlorocyclopropyl derivative of diethylstilbestrol (DES), were synthesized and tested for their ability to inhibit the assembly of tubulin into micro tubules. Including 1, 17 cyclopropyl compounds were tested. One (Z-1,1-dichloro-2-(4-methoxyphenyl)-3-phenylcyclopropane (12)) was found to be more active than 1. In addition, E-1,1-dichlorocyclopropylDES (17) was more potent than DES. The E-isomer of 1 (16) was inactive. The cytostatic activities of the compounds against MCF-7 and MDA-MB231 human breast cancer cells, and their abilities to perturb microtubules in MCF-7 cells were also evaluated. Z-Dichloro-2-(4-fluorophenyl)-3-phenylcyclo (5), Z-1,1-dichloro-2-(4-fluorophenyl)-3-(4-methoxyphenyl)cyclopropane (11), and Z-1,1-dichloro-2-(4-methoxyphenyl) -3-phenylcyclopropane (12) were more potent than 1 against the breast cancer cells. (C) 1997 Elsevier Science Ltd.
Synthesis of 2-phenylnaphthalenes from styryl-2-methoxybenzenes
作者:Ramesh Mudududdla、Rohit Sharma、Sheenu Abbat、Prasad V. Bharatam、Ram A. Vishwakarma、Sandip B. Bharate
DOI:10.1039/c4cc05151c
日期:——
A new simple and efficient method for the synthesis of 2-phenylnaphthalenes from electron-rich 1-styryl-2-methoxybenzenes has been described. The reaction proceeds via TFA catalyzed C-C bond cleavage followed by intermolecular [4+2]-Diels-Alder cycloaddition of an in situ formed styrenyl trifluoroacetate intermediate. The quantum chemical calculations identified the transition state for the cycloaddition
Substituted CIS- and trans-stilbenes as therapeutic agents
申请人:Vander Jagt David L.
公开号:US20070249647A1
公开(公告)日:2007-10-25
The present invention relates to method(s) of treating a subject afflicted with cancer or a precancerous condition, an inflammatory disease or condition, and/or stroke or other ischemic disease or condition, the method comprising administering to the subject or patient in need a composition comprising a therapeutically effective amount of a substituted cis or trans-stilbene.
Reactions of radicalcations of eight stilbene derivatives (S•+) have been studied using pulse radiolysis and γ-ray radiolysis in 1,2-dichloroethane or butyl chloride. Unimolecular isomerization fromcis-S•+ to trans-S•+ and bimolecular reactions with O2 (oxidation) and a neutral stilbene (dimerization) occur depending on the substituents. The unimolecular c−t isomerization and the oxidation proceed
使用1,2-二氯乙烷或丁基氯中的脉冲辐射分解和γ射线辐射分解研究了八种二苯乙烯衍生物(S •+)的自由基阳离子的反应。单分子异构化从顺式-小号•+到反式-小号•+和与O-双分子反应2(氧化)和中性茋(二聚)取决于取代基发生。单分子的c - t异构化和氧化反应最好在被对甲氧基(作为供电子取代基)取代的S •+中以k的速率常数进行。i = 4.5×10 6至1.4×10 7 s -1和k O2 =(1.2-4.5)×10 7 M -1 s -1。根据瞬态吸收测量,可以得出结论,正电荷和未成对电子的分离和定位在单分子异构化和氧化反应性中起着最重要的控制作用。二聚化涉及初始形成具有两个苯环重叠的π-络合物,并且被苯环和烯烃碳上的取代基的空间位阻所抑制。
Remarkable Enhancements of Isomerization and Oxidation of Radical Cations of Stilbene Derivatives Induced by Charge-Spin Separation