designed and synthesized. All newly synthesized compounds were evaluated for their a-glucosidase inhibitory activity with resveratrol as positive control in vitro. Except for 3i and 3j, all of the compounds showed a potent inhibitory activity against a-glucosidase with IC50 values in the range of 3.12 ± 1.25 to 45.95 ± 1.26 μM and the purity of these compounds was greater than 95%. The IC50 values were
Enantioselective Construction of the Biologically Important Cyclopenta[1,4]diazepine Framework Enabled by Asymmetric Catalysis by Chiral Spiro-Phosphoric Acid
作者:Meng Sun、Yang Wang、Lei Yin、Yang-Yan Cao、Feng Shi
DOI:10.1002/ejoc.201501255
日期:2015.12
highest catalytic activity on controlling the enantioselectivity of the three-component tandem reaction. This reaction represents the first catalytic asymmetricconstruction of chiral cyclopenta[1,4]diazepine frameworks with structural diversity. The approach also constitutes the first systematic investigation on this catalytic asymmetricthree-componentreaction, which will enrich the fields of both organocatalysis
Diastereo- and Enantioselective Construction of a Bispirooxindole Scaffold Containing a Tetrahydro-β-carboline Moiety through an Organocatalytic Asymmetric Cascade Reaction
作者:Wei Dai、Han Lu、Xin Li、Feng Shi、Shu-Jiang Tu
DOI:10.1002/chem.201402485
日期:2014.9.1
The first catalytic asymmetric construction of a new class of bispirooxindole scaffold‐containing tetrahydro‐β‐carboline moiety has been established through chiral phosphoric acid‐catalyzed three‐component cascade Michael/Pictet–Spengler reactions of isatin‐derived 3‐indolylmethanols, isatins, and amino‐ester, which afforded structurally complex and diverse bispirooxindoles with one quaternary and
Enantioselective Construction of Spiro[indoline-3,2′-pyrrole] Framework via Catalytic Asymmetric 1,3-Dipolar Cycloadditions Using Allenes as Equivalents of Alkynes
作者:Cong-Shuai Wang、Ren-Yi Zhu、Jian Zheng、Feng Shi、Shu-Jiang Tu
DOI:10.1021/jo502516e
日期:2015.1.2
The first catalyticasymmetric1,3-dipolarcycloadditions (1,3-DCs) of isatin-derived azomethine ylide with allenes have been established, which efficiently assembly isatins, amino-esters and 2,3-allenoate into enantioenriched spiro[indoline-3,2′-pyrrole] derivatives with a quaternary stereogenic center in generally high enantioselectivities (80–98% ee). In this allene-involved 1,3-DC, an unexpected
Acetic acid promoted tandem cyclization of in situ generated 1,3-dipoles: stereoselective synthesis of dispiroimidazolidinyl and dispiropyrrolidinyl oxindoles with multiple chiral stereocenters
作者:Koorathota Suman、Sathiah Thennarasu
DOI:10.1039/c5ra17215b
日期:——
Acetic acid catalyzedin situgeneration of ketimine based 1,3-dipoles, and single-step construction of imidazolidine ring with three chiral centers and pyrrolidine ring with four chiral centersviaformation of new C–N and C–C bonds is reported.