5-fluoro-2-(3-methyl-4-nitrophenyl)benzothiazole | 260443-96-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并噻唑类
• 英文名称: 5-fluoro-2-(3-methyl-4-nitrophenyl)benzothiazole
• 英文别名: 5-Fluoro-2-(3-methyl-4-nitrophenyl)-1,3-benzothiazole
• CAS: 260443-96-7
• 化学式: C₁₄H₉FN₂O₂S
• 分子量: 288.302
• InChiKey: ONYWRGLKWLLNJV-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.3
• 重原子数：
  20
• 可旋转键数：
  1
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.07
• 拓扑面积：
  87
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  5-fluoro-2-(3-methyl-4-nitrophenyl)benzothiazole 在 tin(ll) chloride 作用下， 以 乙醇 为溶剂， 生成 化合物5-FLUORO203
  参考文献：
  名称：

  5-和7-单取代和5,6-二取代的2-芳基苯并噻唑的区域专一性合成†

  摘要：

  描述了在苯并噻唑环中取代的一系列抗肿瘤2-芳基苯并噻唑的区域特异性合成。在该方法中，位于苯胺氮氮邻位的溴原子用于指导区域特异性环化，在不存在溴的情况下，会生成区域异构体的混合物。所描述的化学方法适用于合成在芳基环上带有吸电子（-NO 2）和给电子（-NH 2）取代基的2-芳基苯并噻唑。

  DOI：

  10.1016/s0040-4039(99)02076-6
• 作为产物：
  描述：

  3-甲基-4-硝基苯甲酰氯 在 劳森试剂 、 吡啶 、 六甲基磷酰三胺 、 sodium hydride 作用下， 以 N-甲基吡咯烷酮 为溶剂， 反应 17.0h， 生成 5-fluoro-2-(3-methyl-4-nitrophenyl)benzothiazole
  参考文献：
  名称：

  Antitumor Benzothiazoles. 14. Synthesis and in Vitro Biological Properties of Fluorinated 2-(4-Aminophenyl)benzothiazoles

  摘要：

  Synthetic routes to a series of mono- and difluorinated 2-(4-amino-3-substituted-phenyl)benzothiazoles have been devised. Whereas mixtures of regioisomeric 5- and 7-fluorobenzothiazoles were formed from the established Jacobsen cyclization of precursor 3-fluorothiobenzanilides, two modifications to this general process have allowed the synthesis of pure samples of these target compounds. Fluorinated 2-(4-aminophenyl)benzothiazoles were potently cytotoxic (GI(50) < 1 nM) in vitro in sensitive human breast MCF-7 (ER+) and MDA 468 (ER-) cell lines but inactive (GI(50) > 10 muM) against PC 3 prostate, nonmalignant HBL 100 breast, and HCT 116 colon cells. The biphasic dose-response relationship characteristically shown by the benzothiazole series against sensitive cell lines was exhibited by the 4- and 6-fluorobenzothiazoles (10b,d) but not by the 5- and 7-fluoro-benzothiazoles (10h,i). The most potent broad spectrum agent in the NCI cell panel was 2-(4-amino-3-methylphenyl)-5-fluorobenzothiazole (10h) which, unlike the g-fluoro isomer (10d), produces no exportable metabolites in the presence of sensitive MCF-7 cells. Induction of cytochrome P450 CYP1A1, a crucial event in determining the antitumor specificity of this series of benzothiazoles, was not compromised. 10h is currently the focus of pharmaceutical and preclinical development.

  DOI：

  10.1021/jm001104n

文献信息

• Chemistry of Ring-Substituted 4-(Benzothiazol-2-yl)phenylnitrenium Ions from Antitumor 2-(4-Aminophenyl)benzothiazoles
  作者：Yang Zhang、Mrinal Chakraborty、Christian G. Cerda-Smith、Ryan N. Bratton、Natalie E. Maurer、Ethan M. Senser、Michael Novak

  DOI：10.1021/jo400826f

  日期：2013.7.19

  long-lived (530 ns) nitrenium ion 11a by hydrolysis or photolysis in water. In this study, azide trapping shows that 9b–g generate 11b–g via rate-limiting N–O heterolysis. Ion lifetimes, estimated from azide/solvent selectivities, range from 250 to 1150 ns with identical lifetimes for 11a and 11f. Differences in biological activity of the amines are likely not due to differences in the chemistry of the cations

  2-(4-氨基苯基)苯并噻唑的环取代衍生物1a , 1b – g正在开发中作为抗肿瘤剂。一种衍生物1f已作为前药2f Phortress (NSC 710305)进入 1 期临床试验。这些胺被 CYP450 1A1 激活，显然转化为羟胺8a - g，它们很可能被代谢成酯，这些酯电离成负责细胞损伤的氮烯离子。之前我们展示了9a，即8a的乙酸酯，产生长寿命 (530 ns) 氮鎓离子11a在水中水解或光解。在这项研究中，叠氮化物捕集显示，图9b -克生成11B -克通过限速N-O heterolysis。根据叠氮化物/溶剂选择性估计的离子寿命范围为 250 到 1150 ns，11a和11f 的寿命相同。胺的生物活性的差异可能不是由于阳离子化学的差异，而是由于单个胺的代谢活化/失活的差异。与氮烯离子不同，酯的寿命强烈依赖于 3'-Me 取代基。含有 3'-Me 的酯 ( 9b , 9f , 9g)
• Antitumour benzothiazoles. Part 32: DNA adducts and double strand breaks correlate with activity; synthesis of 5F203 hydrogels for local delivery
  作者：Erica L. Stone、Francesca Citossi、Rajinder Singh、Balvinder Kaur、Margaret Gaskell、Peter B. Farmer、Anne Monks、Curtis Hose、Malcolm F.G. Stevens、Chee-Onn Leong、Michael Stocks、Barrie Kellam、Maria Marlow、Tracey D. Bradshaw

  DOI：10.1016/j.bmc.2015.09.052

  日期：2015.11

  Potent, selective antitumour AhR ligands 5F 203 and GW 610 are bioactivated by CYPs 1A1 and 2W1. Herein we reason that DNA adducts' generation resulting in lethal DNA double strand breaks (DSBs) underlies benzothiazoles' activity. Treatment of sensitive carcinoma cell lines with GW 610 generated co-eluting DNA adducts (R-2 > 0.7). Time-dependent appearance of gamma-H2AX foci revealed subsequent DNA double strand breaks. Propensity for systemic toxicity of benzothiazoles steered development of prodrugs' hydrogels for localised delivery. Clinical applications of targeted therapies include prevention or treatment of recurrent disease after surgical resection of solid tumours. In vitro evaluation of 5F 203 prodrugs' activity demonstrated nanomolar potency against MCF-7 breast and IGROV-1 ovarian carcinoma cell lines. (C) 2015 Elsevier Ltd. All rights reserved.
• Bioactivation of Fluorinated 2-Aryl-benzothiazole Antitumor Molecules by Human Cytochrome P450s 1A1 and 2W1 and Deactivation by Cytochrome P450 2S1
  作者：Kai Wang、F. Peter Guengerich

  DOI：10.1021/tx3001994

  日期：2012.8.20

  Both 2-(4-amino-3-methylphenyl)-5-fluorobenzothiazole (SF 203) and 5-fluoro-2-(3,4-dimethoxyphenyl)-benzothiazole (GW 610) contain the benzothiazole pharmacophore and possess potent and selective in vitro antitumor properties. Prior studies suggested the involvement of cytochrome P450 (P450) 1A1 and 2W1-mediated bioactivation in the antitumor activities and P450 2S1-mediated deactivation of 5F 203 and GW 610. In the present study, the biotransformation pathways of 5F 203 and GW 610 by P450s 1A1, 2W1, and 2S1 were investigated, and the catalytic parameters of P450 1A1- and 2W1-catalyzed oxidation were determined in steady-state kinetic studies. The oxidations of SF 203 catalyzed by P450s 1A1 and 2W1 yielded different products, and the formation of a hydroxylamine was observed for the first time in the latter process. Liquid chromatography-mass spectrometry (LC-MS) analysis with the synthetic hydroxylamine and also a P450 2W1/5F 203 incubation mixture indicated the formation of dGuo adduct via a putative nitrenium intermediate. P450 2W1-catalyzed oxidation of GW 610 was 5-fold more efficient than the P450 1A1-catalyzed reaction. GW 610 underwent a two-step oxidation process catalyzed by P450 1A1 or 2W1: a regiospecific O-demethylation and a further hydroxylation. Glutathione (GSH) conjugates of 5F 203 and GW 610, presumably through a quninoneimine and a 1,2-quinone intermediate, respectively, were detected. These results demonstrate that human P450s 1A1 and 2W1 mediate 5F 203 and GW 610 bioactivation to reactive intermediates and lead to GSH conjugates and a dGuo adduct, which may account for the antitumor activities of 5F 203 and GW 610 and also be involved in cell toxicity. P450 2S1 can catalyze the reduction of the hydroxylamine to the amine 5F 203 under anaerobic conditions and, to a lesser extent, under aerobic conditions, thus attenuating the anticancer activity.