An unprecedented cascade reaction of isocyanide and methyleneindolinone has been established, which represents a novel and different reaction mode. This present transformation involves the ring-opening of methyleneindolinone and the construction of two other new rings simultaneously in an atom-economic manner.
Regioselective ring expansion followed by H-shift of 3-ylidene oxindoles: a convenient synthesis of N-substituted/un-substituted pyrrolo[2,3-<i>c</i>] quinolines and marinoquinolines
and metal-free protocol for the synthesis of 4-oxo-4,5-dihydro-3H-pyrrolo[2,3-c]quinolines. The present method under mild reaction conditions with wide functional group compatibility gives several unexplored N-substituted/unsubstituted 4-oxo-4,5-dihydro-3H-pyrrolo[2,3-c]quinolines and marinoquinolines in good to excellent yields. Mechanistic insights for the synthesis of N-substituted pyrroloquinolines
在此,我们报告了一种用于合成 4-oxo-4,5-dihydro-3 H -pyrrolo[2,3 - c ] 喹啉的简单且无金属的方案。本方法在温和的反应条件下具有广泛的官能团相容性,以良好至优异的产率提供了几种未开发的 N-取代/未取代 4-oxo-4,5-dihydro-3 H -pyrrolo [2,3 - c ] 喹啉和 marinoquinolines。N-取代吡咯并喹啉合成的机理研究揭示了 3-亚基氧吲哚的扩环和 H 位移是关键步骤。
BF<sub>3</sub>·OEt<sub>2</sub> Mediated Regioselective Reaction of Electron-Rich Arenes with 3-Ylidene Oxindoles
作者:Nitika Sharma、Rama Krishna Peddinti
DOI:10.1021/acs.joc.6b02395
日期:2017.1.20
A BF3·OEt2 mediated novel and regioselective protocol for the construction of a C–C bond between 3-ylidene oxindoles and electron-rich arenes has been successfully accomplished. The reaction was compatible with a wide variety of electron-rich arenes. A cascade reaction of 3-ylidene oxindoles with phenols and β-naphthol resulted in 2,3-difunctionalized benzofuran and lactone bearing indoline-2-one scaffolds
,3′-pyrazol]-2-one derivatives (20–24) as potent anticancer agents. These compounds were evaluated for in vitro antitumor activity against the National Cancer Institute panel of 60 cancer cell lines. Among all the synthesized compounds, two compounds 15 and 16 showed remarkable antitumor activity with GI50 (MG-MID) values of 0.65 & 0.72 µM, respectively against Non-small cell lung cancer. To gain insight
A New [2+2+1] Heterocyclization for the Synthesis of 2,3,5-Trisubstituted Thiophenes under Microwave Irradiation
作者:Bo Jiang、Shu-Jiang Tu、Hai-Wei Xu、Guan-Hua Ma
DOI:10.1055/s-0033-1339917
日期:——
Abstract A new three-component strategy for the efficient synthesis of 2,3,5-trisubstituted thiophene derivatives through a [2+2+1] heterocyclization between 3-(2-aryl-2-oxoethylidene)-2-oxindoles and α-thiocyanato ketones under microwave irradiation is described. The bond-forming efficiency, accessibility, and generality of this synthesis make it highly valuable to assemble thiophene scaffolds. A new three-component