Synthesis, in vitro and in vivo activity of benzophenone-based inhibitors of steroid sulfatase
摘要:
Steroid sulfatase (STS) is all important new therapeutic target in oncology. Attempts to design nonsteroidal STS inhibitors, because of the oestrogenicity of the original lead oestrone 3-O-sulfamate in rodents, have led to the discovery of benzophenone-4,4'-O,O-bis-sulfamate (BENZOMATE, 3). The nonfused bicyclic BENZOMATE is a highly potent STS inhibitor in vitro, inhibiting STS activity in intact MCF-7 breast cancer cells by >70% at 0.1 muM and in placental microsomes by >98% at 10 mum. When MCF-7 cells were pre-treated with 3 at 1 muM and then washed to remove unbound inhibitor, the initial 94% inhibition was reduced to 89% suggesting that 3, like other sulfamate-based STS inhibitors, inhibits the enzyme irreversibly. This agent also inhibits rat liver STS activity by 84% and 93% respectively 24 h after a single dose of 1 or 10 mg/kg, demonstrating that BENZOMATE possesses similar in Vivo potency to the established potent nonsteroidal inhibitor 667COUMATE. Several modifications were made to BENZOMATE structurally and effects on in vitro activity were examined. These structure-activity relationship studies show that its carbonyl and bis-sulfamate groups are pivotal for activity, although conformational flexibility is not required. Two rigid anthraquinone-based sulfamate derivatives however showed inhibitory activity significantly better than BENZOMATE in the MCF-7 cell assay. BENZOMATE and related analogues therefore represent all important class of non-steroidal STS inhibitor and lead compounds for future drug design. (C) 2004 Elsevier Ltd. All rights reserved.
Synthesis and Biological Evaluation of 1-(Diarylmethyl)-1H-1,2,4-triazoles and 1-(Diarylmethyl)-1H-imidazoles as a Novel Class of Anti-Mitotic Agent for Activity in Breast Cancer
作者:Gloria Ana、Patrick M. Kelly、Azizah M. Malebari、Sara Noorani、Seema M. Nathwani、Brendan Twamley、Darren Fayne、Niamh M. O’Boyle、Daniela M. Zisterer、Elisangela Flavia Pimentel、Denise Coutinho Endringer、Mary J. Meegan
DOI:10.3390/ph14020169
日期:——
We report the synthesis and biochemical evaluation of compounds that are designed as hybrids of the microtubule targeting benzophenone phenstatin and the aromatase inhibitor letrozole. A preliminary screening in estrogen receptor (ER)-positive MCF-7 breast cancer cells identified 5-((2H-1,2,3-triazol-1-yl)(3,4,5-trimethoxyphenyl)methyl)-2-methoxyphenol 24 as a potent antiproliferative compound with
我们报告了化合物的合成和生化评估,这些化合物被设计为靶向二苯甲酮芬司他汀和芳香酶抑制剂来曲唑的微管杂合体。对雌激素受体 (ER) 阳性 MCF-7 乳腺癌细胞的初步筛选鉴定出 5-((2 H -1,2,3-三唑-1-基)(3,4,5-三甲氧基苯基)甲基)-2 -甲氧基苯酚24作为一种有效的抗增殖化合物,在 MCF-7 乳腺癌细胞 (ER+/PR+) 中的 IC 50值为 52 nM,在三阴性 MDA-MB-231 乳腺癌细胞中的 IC 50 值为 74 nM。这些化合物在 MCF-7 细胞系中表现出显着的 G 2 /M 期细胞周期停滞和诱导细胞凋亡,抑制微管蛋白聚合,并且在非致瘤性 MCF-10A 乳腺细胞中进行评估时对癌细胞具有选择性。 MCF-7 细胞的免疫荧光染色证实,这些化合物靶向微管蛋白并诱导多核,这是有丝分裂灾难的公认标志。微管蛋白秋水仙碱结合位点中化合物19e 、 21l
Fluoride-Triggered Ring-Opening of Photochromic Diarylpyrans into Merocyanine Dyes: Naked-Eye Sensing in Subppm Levels
merocyanine dyes with high molar absorptivities to permit naked-eye sensing. The absorption spectral shifts, i.e., differences in the absorption maxima of colorless and colored forms, observed for a rationally designed set of silyloxy-substituted diarylpyrans subsequent to fluoride-induced ring opening are remarkably high (330–480 nm), and are unknown for any colorimetricprobe. In particular, the disilyloxy-substituted
Facile Synthesis of Phthalides from Methyl <i>ortho</i>-Iodobenzoates and Ketones via an Iodine–Magnesium Exchange Reaction Using a Silylmethyl Grignard Reagent
作者:Yu Nakamura、Suguru Yoshida、Takamitsu Hosoya
DOI:10.1246/cl.170211
日期:2017.6.5
Phthalides have been easily prepared by the treatment of methyl o-iodobenzoates with a silylmethyl Grignard reagent in the presence of ketones. The electron-withdrawing ester moiety of methyl o-iodobenzoates and the low nucleophilicity of the silylmethyl Grignard reagent prompted a smooth iodine–magnesium exchange reaction, at room temperature, without affecting the ester moiety or resulting in an
A Chiral Nitrogen Ligand for Enantioselective, Iridium-Catalyzed Silylation of Aromatic C−H Bonds
作者:Bo Su、Tai-Gang Zhou、Xian-Wei Li、Xiao-Ru Shao、Pei-Lin Xu、Wen-Lian Wu、John F. Hartwig、Zhang-Jie Shi
DOI:10.1002/anie.201609939
日期:2017.1.19
containing dative nitrogen ligands are highly active for the borylation and silylation of C−Hbonds, but chiral analogs of these catalysts for enantioselective silylation reactions have not been developed. We report a new chiral pyridinyloxazoline ligand for enantioselective, intramolecular silylation of symmetrical diarylmethoxy diethylsilanes. Regioselective and enantioselective silylation of unsymmetrical
作者:Jiajia Dong、K. Barry Sharpless、Luke Kwisnek、James S. Oakdale、Valery V. Fokin
DOI:10.1002/anie.201403758
日期:2014.9.1
High‐molecular‐weight polysulfates are readily formed from aromatic bis(silyl ethers) and bis(fluorosulfates) in the presence of a base catalyst. The reaction is fast and proceeds well under neat conditions or in solvents, such as dimethyl formamide or N‐methylpyrrolidone, to provide the desired polymers in nearly quantitative yield. These polymers are more resistant to chemical degradation than their