Brønsted Base and Lewis Acid Cooperatively Catalyzed Asymmetric <i>exo</i>′-Selective [3 + 2] Cycloaddition of Trifluoromethylated Azomethine Ylides and Methyleneindolinones
作者:Yang Yi、Yuan-Zhao Hua、Hui-Jie Lu、Lan-Tao Liu、Min-Can Wang
DOI:10.1021/acs.orglett.0c00283
日期:2020.4.3
3-dipolar cycloaddition is reported through chiral dinuclear zinc catalysts. An asymmetric exo′-selective [3 + 2] cycloaddition of CF3-containing N-unprotected isatin-derived azomethineylides is realized. In the presence of 10 mol % of catalyst, azomethineylides react efficiently with methyleneindolinones, giving a series of trifluoromethyl-substituted 2,3-pyrrolidinyl dispirooxindoles with highly enantio-
Highly Stereoselective [3+2] Cycloadditions of Chiral Palladium-Containing<i>N</i><sup>1</sup>-1,3-Dipoles: A Divergent Approach to Enantioenriched Spirooxindoles
A catalytic asymmetric [3+2] cycloaddition reaction of chiral palladium‐containing N1‐1,3‐dipoles with methyleneindolinones has been successfully developed. The reaction allows an efficient construction of 3,3′‐pyrrolinyl spirooxindoles with high yields and excellent stereoselectivities (up to 93 % yield, 19:1 d.r. and >99 % ee). A synthetic application of this methodology is demonstrated and a stereocontrol
Diastereoselective Synthesis of Functionalized Spirocyclopropyl Oxindoles via P(NMe<sub>2</sub>)<sub>3</sub>-Mediated Reductive Cyclopropanation
作者:Rong Zhou、Changjiang Yang、Yiyi Liu、Ruifeng Li、Zhengjie He
DOI:10.1021/jo502106c
日期:2014.11.7
A P(NMe2)3-mediated reductive cyclopropanation reaction of α-keto esters or amides with isatin-derivedalkenes has been developed, providing efficient and diastereoselective synthesis of highly functionalized spirocyclopropyl oxindoles bearing two all-carbon quaternary centers. This reaction also represents a complementary and nonmetal-involving protocol for the challenging cyclopropanation of electron-deficient
Dual activity of indolin-2-ones containing an arylidene motif: DNA and BSA interaction
作者:Syed Nasir Abbas Bukhari、Tariq G. Alsahli、Hasan Ejaz、Naveed Ahmed、Waqas Ahmad、Mervat A. Elsherif、Nasser H. Alotaibi、Kashaf Junaid、Nenad Janković
DOI:10.1039/d3ra04997c
日期:——
The arylidene indolin-2-ones showed significant dual biological activity against MCF-T cancer cell lines and Candida species. The most promising molecule for further investigation contains an m-aminophenyl fragment.