Design, synthesis and biological evaluations of novel oxindoles as HIV-1 non-nucleoside reverse transcriptase inhibitors. Part I
摘要:
A novel oxindole was discovered as an HIV non-nucleoside reverse transcriptase inhibitor via HTS using a cell-based assay. Systematic structural modifications were carried out to establish its SAR. These modifications led to the identification of oxindoles with low nanomolar potency for inhibiting HIV replication. These novel and potent oxindoles could serve as advanced leads for further optimizations. (C) 2006 Elsevier Ltd. All rights reserved.
When Ethyl Isocyanoacetate Meets Isatins: A 1,3-Dipolar/Inverse 1,3-Dipolar/Olefination Reaction for Access to 3-Ylideneoxindoles
作者:Wen-Kui Yuan、Tao Cui、Wei Liu、Li-Rong Wen、Ming Li
DOI:10.1021/acs.orglett.8b00217
日期:2018.3.16
A new CuI/1,10-phen-catalyzed reaction for the synthesis of 3-ylideneoxindoles from readily available isatins and ethyl isocyanoacetate, in which ethyl isocyanoacetate acts as a latent two-carbon donor like the Wittig reagent, is reported. A tandem procedure including 1,3-dipolar cycloaddition/inverse 1,3-dipolar ring opening/olefination allows the preparation of 3-ylideneoxindoles with broad functional
An efficient one pot regioselective synthesis of a 3,3′-spiro-phosphonylpyrazole-oxindole framework via base mediated [1,3]-dipolar cycloaddition reaction of the Bestmann–Ohira reagent with methyleneindolinones
作者:Anil M. Shelke、Gurunath Suryavanshi
DOI:10.1039/c5ob01020a
日期:——
regioselective synthesis of racemic 3,3′-spiro-phosphonylpyrazole-oxindole by 1,3-dipolar cycloaddition of an in situ generated anion of dialkyl 1-diazomethylphosphonate from the Bestmann–Ohira reagent (BOR) & methyleneindolinones has been developed. The synthesis affords the highly functionalized pyrazole scaffolds in good yields with excellent regioselectivity under mild reaction conditions within
Asymmetric Synthesis of Spirooxindoles with Seven Stereocenters via Organocatalyzed One‐pot Three‐component Sequential Cascade Reactions
作者:Bo‐Liang Zhao、Da‐Ming Du
DOI:10.1002/adsc.201900218
日期:2019.7.11
three‐component Michael/Mannich‐Michael/cyclization sequential cascade reaction for the construction of bispirooxindole‐spirooxindoles was developed in good yields with excellent stereoselectivities (up to >20:1 dr, 99% ee). A series of original cinnamoyl‐3‐ylideneoxindoles have been applied to this sequential cascade strategy for the first time. This new strategy provides a process for the enantioselective construction
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.