Oxidative annulation of acetophenones and 2-aminobenzothiazoles catalyzed by reusable nickel-doped LaMnO<sub>3</sub> perovskites
作者:Phuong T. Pham、Duyen K. Nguyen、Nam T. S. Phan、Minh-Vien Le、Tung T. Nguyen
DOI:10.1039/d2ra08045a
日期:——
report a method for direct coupling of acetophenones and 2-aminobenzothiazoles in the presence of reusable perovskites, namely LaMn0.95Ni0.05O3. Imidazole[2,1-b]benzothiazoles were obtained in moderate to good yields and contained an array of useful functionalities. Control experiments indicated that the perovskites played pivotal roles in halogenation and condensation steps.
咪唑 [2,1- b ] 苯并噻唑的合成通常受到使用预功能化底物和/或均相、不可回收催化系统的影响。在此,我们报告了一种在可重复使用的钙钛矿(即 LaMn 0.95 Ni 0.05 O 3)存在下直接偶联苯乙酮和 2-氨基苯并噻唑的方法。咪唑 [2,1- b ] 苯并噻唑以中等到良好的产率获得,并包含一系列有用的功能。对照实验表明,钙钛矿在卤化和缩合步骤中起着关键作用。
Synthesis and biological evaluation of novel Mannich bases of 2-arylimidazo[2,1-b]benzothiazoles as potential anti-cancer agents
A new series of Mannichbases of 2-arylimidazo[2,1-b]benzothiazoles were synthesized and evaluated for their anti-cancer activity. These compounds showed better cytotoxicity activity with IC50 values ranging from 2.8 to 8.0 μM in HepG2, MCF-7 and HeLa cell lines. Further mechanism aspects responsible for the anti-cancer activity of two promising compounds 3c and 3f in HepG2 cell line were studied.
合成了一系列新的2-芳基咪唑[2,1- b ]苯并噻唑的曼尼希碱,并对其抗癌活性进行了评估。这些化合物在HepG2,MCF-7和HeLa细胞系中的IC 50值为2.8至8.0μM,表现出更好的细胞毒性活性。研究了两个有前途的化合物3c和3f在HepG2细胞系中的抗癌活性的进一步机制。有趣的是,3c,3f诱导了G2 / M细胞周期的阻滞,同时下调了细胞周期蛋白B和Chk2蛋白。此外,化合物3c,3f还显示了凋亡的特征,例如caspase-3水平的增加。用化合物处理导致生命细胞增殖蛋白(例如Jun(C-Jun,JunB),p38 MAPK,p-JNK和PKCα)水平降低。该系列化合物3f可以看作是其发展为新型抗癌药的潜在先导。
Heteroarylation of Congested α-Bromoamides with Imidazo-Heteroarenes and Indolizines via Aza-Oxyallyl Cations: Enroute to Dibenzoazepinone and Zolpidem Analogues
作者:Elagandhula Sathish、Ashis Kumar Gupta、Deeksha、Sandeep Kumar Mishra、Devesh M. Sawant、Ritesh Singh
DOI:10.1021/acs.joc.2c01708
日期:2022.11.4
unprecedented approach for heteroarylation of congested α-bromoamides via electrophilic aromatic substitution of imidazo-heteroarenes and indolizines under mild reaction conditions (room temperature, metal, and oxidant free). The participation of an in situ generated aza-oxyallyl cation as an alkylatingagent is the hallmark of this transformation. The method was readily adapted to synthesize novel im