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.
Tetraethylammonium iodide catalyzed synthesis of diaryl ketones via the merger of cleavage of C–C double bonds and recombination of aromatic groups
作者:Xianghua Zeng、Daqian Xu、Chengxia Miao、Chungu Xia、Wei Sun
DOI:10.1039/c4ra08764j
日期:——
An efficient method for synthesizing diaryl ketones via merging of oxidative cleavage of C–C doublebonds and recombination of aromatic groups is developed with Et4NI (2.5 mol%) as the catalyst and NaIO4 as the oxidant. The control experiments provide valuable mechanistic insights into the formation of diaryl ketones, and suggest that NaIO4 serves as an epoxidation and nucleophilic deformylation reagent
Facile and highly chemoselective synthesis of benzil derivatives via oxidation of stilbenes in an I2–H2O system
作者:Xianghua Zeng、Chengxia Miao、Shoufeng Wang、Chungu Xia、Wei Sun
DOI:10.1039/c3ra41489b
日期:——
A facile and highlychemoselective protocol for the synthesis of benzil derivatives has been developed by oxidation of stilbenes in an I2–H2O system under air. Notably, the method was applicable to 26 examples and provided up to 98% yield, avoiding the use of acid, metal catalysts and so on.
<i>o</i>-Iodoxybenzoic acid mediated generation of aryl free radicals: synthesis of stilbenes through C–C cross-coupling with β-nitrostyrenes
作者:Ganesh Wagh、Snehalata Autade、Pravin C. Patil、Krishnacharya G. Akamanchi
DOI:10.1039/c7nj04701k
日期:——
substrate scope and transitionmetalfree, mild reaction conditions, under an open atmosphere in a short reaction time. A free radical mediated mechanism was postulated and supported by radical trapping experiments. Application of the developed methodology is demonstrated through a simple, two step synthesis of resveratrol, a valuable stilbenoid for anticancer and neurological studies via its prodrug E-1,
Electrochemical Proton Reduction over Nickel Foam for
<i>Z</i>
‐Stereoselective Semihydrogenation/deuteration of Functionalized Alkynes
作者:Alejandro Valiente、Pablo Martínez‐Pardo、Gurpreet Kaur、Magnus J. Johansson、Belén Martín‐Matute
DOI:10.1002/cssc.202102221
日期:2022.1.10
Foam catalyst: Commercially available nickel foam is an excellent catalyst for the electrochemical semihydrogenation/semideuteration of functionalized alkynes in diluted sulfuric acid under ambient conditions. Here, the applicability of this catalyst for the stereoselective synthesis of Z-alkenes and Z-alkenes-d2 is presented. The nickel foam is recyclable up to 14 times without losing its catalytic
TRIARYLAMINE DERIVATIVE AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER
申请人:KYOCERA Document Solutions Inc.
公开号:US20160152552A1
公开(公告)日:2016-06-02
A triarylamine derivative is represented by general formula (1) shown below.
In general formula (1), R
1
, R
2
, and R
3
each represent, independently of one another, a halogen atom, an optionally substituted alkyl group having a carbon number of at least 1 and no greater than 6, an optionally substituted alkoxy group having a carbon number of at least 1 and no greater than 6, or an optionally substituted aryl group having a carbon number of at least 6 and no greater than 12. In general formula (1), o, p, and q each represent, independently of one another, an integer of at least 0 and no greater than 4, and m and n each represent, independently of one another, an integer of at least 1 and no greater than 2.