ABSTRACT An efficient and greener protocol for easy access to 3-susbstituted-3-hydroxy-2-oxindoles by the reaction with various substituted isatins and acetophenones is described. This protocol is widely applicable for a variety of isatins and acetophenones using water as a reaction media and 1,4-diazabicyclo[2.2.2]octane (DABCO) as catalyst with shorter reaction time and good to excellent yield of
A simple and directsynthesis of substituted2-phenylquinoline-4-carboxamidesfrom 3-substituted-3hydroxyindolines in presence of ammonium acetate is described. The developed protocol also allows synthesis of the carboxamide moeity directly from isatin and acetophenone in one pot under optimized conditions. The protocol has the merits of simple reaction conditions, easy work up process and good yields
Metal-free radical nitration of the β C–H bond of 3-alkylidene-2-oxindoles with tert-butyl nitrite (TBN) has been explored. Interestingly, (E)-3-(2-(aryl)-2-oxoethylidene)oxindole and (E)-3-ylidene oxindole give different diastereomers on nitration. The mechanistic investigation revealed that the diastereoselectivity was controlled by the size of the functional group. Another transformation of 3-(nitroalkylidene)
已经探索了 3-alkylidene-2-oxindoles 的 β C-H 键与亚硝酸叔丁酯 (TBN)的金属自由基硝化反应。有趣的是,( E )-3-(2-(aryl)-2-oxoethylidene)oxindole 和 ( E )-3-ylidene oxindole 在硝化时给出不同的非对映异构体。机理研究表明,非对映选择性受官能团大小的控制。通过金属和无氧化剂的甲苯磺酰肼介导的磺化作用,将 3-(硝基亚烷基) 羟吲哚转化为 3-(甲苯磺酰亚烷基) 羟吲哚。这两种方法都具有起始材料容易获得和操作简单的优点。
Synthesis and biological evaluation of spiro[cyclopropane-1,3′-indolin]-2′-ones as potential anticancer agents
作者:Chada Narsimha Reddy、V. Lakshma Nayak、Geeta Sai Mani、Jeevak Sopanrao Kapure、Praveen Reddy Adiyala、Ram Awatar Maurya、Ahmed Kamal
DOI:10.1016/j.bmcl.2015.08.056
日期:2015.10
Libraries of spiro[cyclopropane-1,3'-indolin]-2'-ones were synthesized and evaluated for their biological activity against five different human cancer cell lines HT-29 (colon cancer), DU-145 (prostate cancer), Hela (cervical cancer), A-549 (Lung cancer), and MCF-7 (breast cancer). Many compounds of the series exhibited promising anticancer activity (IC50 < 20 mu M) against the studied cell lines. Based on the screening results, a structure activity relationship (SAR) of the pharmacophore was proposed. Among the series compound 6b and 6u showed significant activity against human prostate cancer cell line, DU-145. Flow cytometric analysis showed that these two compounds arrested the cell cycle in the G0/G1 phase leading to caspase-3 dependent apoptotic cell death. Further, measurement of mitochondrial membrane potential and Annexin V-FITC assay also suggested that 6b and 6u induced cell death by apoptosis. (C) 2015 Elsevier Ltd. All rights reserved.
Chalcone based azacarboline analogues as novel antitubulin agents: Design, synthesis, biological evaluation and molecular modelling studies
作者:Sahil Sharma、Charanjit Kaur、Abhishek Budhiraja、Kunal Nepali、Manish K. Gupta、A.K. Saxena、P.M.S. Bedi
DOI:10.1016/j.ejmech.2014.08.005
日期:2014.10
The present study involves the design of a series of 3-aryl-9-acetyl-pyridazino[3,4-b]indoles as constrained chalcone analogues. A retrosynthetic route was proposed for the synthesis of target compounds. All the synthesized compounds were evaluated for in-vitro cytotoxicity against THP-1, COLO-205, HCT-116 and A-549 human cancer cell lines. The results indicated that 2a, 3a, 5a and 6a possessed significant