Results 191 to 200 of about 25,436 (256)

Photoinduced Nonstabilized Azomethine Ylide Formation for the Preparation of Fluorine Containing Pyrrolidines.

Journal of Organic Chemistry, 2019
A mild and reproducible method for the formation of a nonstabilized azomethine ylide was developed by photoinduced reaction catalyzed with eosin Y under green light irradiation. Resulting 1,3-dipole was trapped with fluoroalkenes, fluoroalkylated alkenes,
Thibault Thierry, Cyril Lebargy, E. Pfund, T. Lequeux   +3 more
semanticscholar   +1 more source

ChemInform Abstract: THE CHEMISTRY OF AN ISOLABLE AZOMETHINE YLIDE

Chemischer Informationsdienst, 1984
AbstractDas Nitron (I) reagiert mit den Acetylenen (II) zu den Isoxazolinen (III).
Rolf Huisgen, Karl Niklas
openaire   +2 more sources

Synthesis of heterocycle appended spiro(oxindole-3,2’-pyrrolidine) derivatives from heterocyclic ylidenes and azomethine ylide through 1,3-dipolar cycloaddition reactions

Synthetic Communications, 2019
Spiro(oxindole-3,2’-pyrrolidine) is a privileged scaffold displaying a wide spectrum of biological activities. A series of these molecules containing heterocyclic rings attached to the pyrrolidine unit has been synthesized utilizing the classical 1,3 ...
S. Vidya, K. Priya, Devi Velayudhan Jayasree, A. Deepthi, P. G. Biju   +4 more
semanticscholar   +1 more source

Cross 1,3-dipolar cycloadditions of C,N-cyclic azomethine imines with an N-benzyl azomethine ylide: facile access to fused tricyclic 1,2,4-hexahydrotriazines.

Organic and biomolecular chemistry, 2019
A cross 1,3-dipolar cycloaddition of two different ylides between C,N-cyclic azomethine imines with an in situ-generated nonstabilized azomethine ylide from an N-benzyl precursor was realized.
Kaikai Wang, Yanli Li, Zhanyong Wang, Menghui Hu, Ting-ting Qiu, Bao-Ku Zhu   +5 more
semanticscholar   +1 more source

Ligand-Controlled Inversion of Diastereo- and Enantioselectivity in Silver-Catalyzed Azomethine Ylide-Imine Cycloaddition of Glycine Aldimino Esters with Imines.

Organic Letters, 2018
A highly diastereo- and enantioselective silver-catalyzed azomethine ylide-imine (AYI) cycloaddition reaction of glycine aldimino esters with imines was developed in which the Xing-Phos-controlled syn-selective or DTBM-Segphos-induced anti-selective AYI ...
Bo Yu, Ke-Fang Yang, X. Bai, Jian Cao, Zhanjiang Zheng, Yu-Ming Cui, Zheng Xu, Li Li, Li‐Wen Xu   +8 more
semanticscholar   +1 more source

A dehydrogenation route to azomethine ylides and isoindoles

Journal of the Chemical Society, Perkin Transactions 1, 1989
AbstractDehydrogenation of the compounds (I) leads to azomethine ylides which are trapped by the imide (II).
Frances Heaney, Ronald Grigg
openaire   +3 more sources

Transition-Metal-Free Access to Pyridocarbazoles from 2-Alkynylindole-3-carbaldehydes via Azomethine Ylide.

Journal of Organic Chemistry, 2018
An efficient approach for the synthesis of functionalized tetrahydro-pyrido/quinolinocarbazoles from 2-alkynylindole-3-carbaldehydes and l-proline utilizing a metal-free decarboxylative cyclization, ring expansion, and ring contraction strategy via the ...
Shalini Verma, P. Mishra, M. Kumar, Souvik Sur, A. Verma   +4 more
semanticscholar   +1 more source

Catalytic asymmetric chemoselective 1,3-dipolar cycloadditions of an azomethine ylide with isatin-derived imines: diastereo- and enantioselective construction of a spiro[imidazolidine-2,3'-oxindole] framework.

Chemical Communications, 2016
A catalytic asymmetric chemoselective 1,3-dipolar cycloaddition (1,3-DC) of an azomethine ylide with imines has been established via a three-component reaction of isatin-derived imines, aldehydes and an amino-ester in the presence of chiral phosphoric ...
Yue-Ming Wang, Honghao Zhang, Can Li, Tao Fan, F. Shi   +4 more
semanticscholar   +1 more source

Azomethine Ylide Cycloaddition Approach toward Dendrobine: Synthesis of 5-Deoxymubironine C.

Journal of Organic Chemistry, 2018
A concise route to the azatricyclo[6.2.1.04,11]undecane core of (-)-dendrobine and (-)-mubironine C is described wherein an unstabilized azomethine ylide cycloaddition provides the complete carbon framework of the natural products.
Benjamin M Williams, D. Trauner
semanticscholar   +1 more source

Intramolecular Dipolar Cycloaddition Reactions of Azomethine Ylides

Chemical Reviews, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Iain Coldham, Richard Hufton
openaire   +4 more sources