A series of imidazo[2,1-b]thiazole linked triazole conjugates were synthesized by using Huisgen 1,3-dipolar cyclo-addition reaction (click chemistry approach) and evaluated for their antiproliferative activity against some human cancer cell lines like, HeLa (cervical), DU-145 (prostate), A549 (lung), MCF-7 (breast) and HepG2 (liver). Among them, Conjugates 4g and 4h demonstrated a significant antiproliferative
使用Huisgen 1,3-偶极环加成反应(点击化学方法)合成了一系列咪唑并[2,1- b ]噻唑连接的三唑共轭物,并评估了其对某些人类癌细胞系HeLa(宫颈),DU-145(前列腺),A549(肺),MCF-7(乳房)和HepG2(肝脏)。其中,结合物4g和4h具有IC 50对人肺癌细胞(A549)的显着抗增殖作用值分别为0.92和0.78μM。流式细胞仪分析表明,这些缀合物诱导了A549肺癌细胞在G2 / M期的细胞周期停滞。微管蛋白聚合测定和免疫荧光分析表明,这些缀合物分别在无细胞和基于细胞的(A549)实验中有效抑制微管组装。此外,通过Hoechst染色,线粒体膜电位和膜联蛋白V-FITC测定来评估细胞凋亡诱导特性。此外,对促凋亡蛋白Bax和抗凋亡蛋白Bcl-2进行了蛋白质印迹分析,结果表明Bax的上调和Bcl-2的下调表明这些化合物诱导了人肺癌细胞A549的凋亡。
A fluorescence probe based on 6-phenylimidazo[2,1-<i>b</i>]thiazole and salicylaldehyde for the relay discerning of In<sup>3+</sup> and Cr<sup>3+</sup>
A new fluorescence probe, (E)-N′-(2-hydroxybenzylidene)-6-phenylimidazo[2,1-b]thiazole-3-carbohydrazide (LB1), based on 6-phenylimidazo[2,1-b]thiazole and salicylaldehyde was designed and synthesized.
Synthesis of Ethyl 8‐Aryl‐8‐hydroxy‐3‐oxo‐8<i>H</i>[1,2,4]oxadiazolo‐[3,4‐<i>c</i>][1,4]thiazine‐5‐carboxylates by Ring‐Expansion Rearrangement
作者:Rajesh Koti、Vinayak Hegde、Gundurao Kolavi,、Imtiyaz Ahmed Khazi
DOI:10.1080/00397910701265945
日期:2007.5.1
The title compounds were prepared by the ring-ring interconversion of ethyl 5-nitroso-6-arylimidazo[2,1-b] thiazole-3-carboxylates with hydrochloric acid. The effect of electron-withdrawing substituent in the thiazole ring on the general applicability of the ring-ring interconversion has been also evaluated.
Metal-Free Aerobic Oxidative Selective C–C Bond Cleavage in Heteroaryl-Containing Primary and Secondary Alcohols
aerobic oxidativeselective C–C bond-cleavage reaction in primary and secondary heteroaryl alcohols is reported. This reaction was highly efficient and tolerated various heteroaryl alcohols, generating a carboxylic acid derivative and a neutral heteroaromatic compound. Experimental studies combined with density functional theory calculations revealed the mechanism underlying the selective C–C bond