A Mild Highly Efficient and Green Protocol for Preparation of N-alk-2′-Enoyl Cyclic Imides Using Basic Ionic Liquid [bmIm]OH as Base and Reaction Medium
作者:Yongjiang Wang、Jianwei Mao、Wen Pei
DOI:10.3184/030823408x356305
日期:2008.10
An efficient and green protocol for the preparation of N-alk-2′-enoyl cyclic imides at room temperature was developed using a basic ionicliquid, 1-methyl-3-butylimidazolium hydroxide, [bmIm]OH, as a base and a reactionmedium.
Palladacycle Catalyzed Asymmetric PH Addition of Diarylphosphines to<i>N</i>-Enoyl Phthalimides
作者:Renta Jonathan Chew、Yunpeng Lu、Yu-Xiang Jia、Bin-Bin Li、Esther Hui Yen Wong、Rosanne Goh、Yongxin Li、Yinhua Huang、Sumod Appukuttan Pullarkat、Pak-Hing Leung
DOI:10.1002/chem.201403885
日期:2014.10.27
The first asymmetric phospha‐Michael addition of diarylphosphines to N‐enoyl phthalimides has been developed in the presence of a chiral palladacycle catalyst. A library of free chiral tertiary phosphine adducts were directly obtained with excellent yields and enantioselectivities. Products can be subsequently functionalized to afford β‐phosphinoamides, the direct preparation of which from cinnamides
approach for the stereocontrolledconstruction of the 3,4-dihydrothiacarbazol-2(9H)-oneskeleton has been developed. In the presence of a bifunctional squaramide catalyst that was derived from L-tert-leucine, the asymmetric tandem Michael/thiolysis reactions of 9-methylindoline-2-thiones and N-alkynoylphthalimides proceeded efficiently to furnish the desired 3,4-dihydrothiacarbazol-2(9H)-one derivatives
Chiral squaramide-catalysed enantioselective Michael/cyclization cascade reaction of 3-hydroxyoxindoles with α,β-unsaturated N-acylated succinimides
作者:Sheng Ming、Bo-Liang Zhao、Da-Ming Du
DOI:10.1039/c7ob01307h
日期:——
Michael/cyclizationcascadereaction of 3-hydroxyoxindoles with α,β-unsaturated N-acylated succinimides is disclosed. With quinine-derived squaramide as the catalyst, a broad range of the desired spirooxindole lactone derivatives bearing two contiguous stereocenters were obtained in good yields (up to 89%) with high diastereoselectivities (up to >95:5 dr) and excellent enantioselectivities (up to 99%