Výsledky vyhledávání - "S. THIANPATANAGUL"

XY–ZH systems as potential 1,3-dipoles. Part 11. Stereochemistry of 1,3-dipoles generated by the decarboxylative route to azomethine ylides

Autor: S. Thianpatanagul, D. Vipond, Sivagnanasundram Surendrakumar, Ronald Grigg

Publikováno v: J. Chem. Soc., Perkin Trans. 1. :2693-2701

The decarboxylative reaction of aryl aldehydes with cyclic secondary α-amino acids or primary α-amino acids in the presence of N-methyl- or N-phenyl-maleimide leads, via an intermediate azomethine ylide, to mixtures of bicyclic pyrrolidine cycloadd

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c19beb0fb85d565506f58c25325935c1
https://doi.org/10.1039/p19880002693

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XY–ZH systems as potential 1,3-dipoles. Part 10. The decarboxylative route to azomethine ylides. Background and relevance to pyridoxal decarboxylases

Autor: Ronald Grigg, Moustafa F. Aly, S. Thianpatanagul, Visuvanathar Sridharan

Publikováno v: J. Chem. Soc., Perkin Trans. 1. :949-955

The reaction of primary and α,α-disubstituted α-amino acids with pyridoxal in the presence of N-phenylmaleimide in various solvents at temperatures up to 120 °C gives rise to two series of cycloadducts. One series arises from azomethine ylides fo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ec5c087f35f940e512af0ab50e8d113d
https://doi.org/10.1039/p19880000949

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X=Y-ZH compounds as potential 1,3-Dipoles. Part 231,2 mechanisms of the reactions of ninhydrin and phenalene trion with ∝-amino acids. X-ray crystal structure of protonated ruhemann's purple, a stable azomethine ylide

Autor: Theeravat Mongkolaussavaratana, Ronald Grigg, S. Thianpatanagul, John F. Malone

Publikováno v: Tetrahedron. 45:3849-3862

The ninhydrin reaction is shown to involve stereospecifically formed azomethine ylides of two types by trapping of the intermediates with maleimides as dipolarophiles. One type of azomethine ylide, in which the carboxyl group of theoriginal ∝-amino

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7e59401da616f4f6cd5744ab4867c4a7
https://doi.org/10.1016/s0040-4020(01)89244-9

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X=Y-ZH Systems as potential 1,3-dipoles

Autor: James Kemp, Ronald Grigg, S. Thianpatanagul

Publikováno v: Tetrahedron Letters. 19:2827-2830

Pyridoxal imines of ∞-amino acid esters and related amines undergo cycloaddition to N-phenylmaleimide on heating in acetonitrile, toluene or xylene. The cyclo-additions proceed in good yield, are stereospecific, and involve an endo-transition state

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e7f2063c760c024b6b950f0d0a1e5dae
https://doi.org/10.1016/s0040-4039(01)94874-9

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XY–ZH systems as potential 1,3-dipoles. Part 6. Metallo-1,3-dipoles. Cycloadditions of divalent metal complexes of glycine and alanine imines to electronegative olefins

Autor: Ronald Grigg, Visuvanathar Sridharan, S. Thianpatanagul

Publikováno v: J. Chem. Soc., Perkin Trans. 1. :1669-1675

Copper(II), zinc(II), and cadmium(II) complexes of imines derived from α-oxo acids and glycine or alanine undergo stereospecific cycloaddition at room temperature to 1,2-disubstituted electronegative olefins in the presence of weak base. Correspondi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::542e2ab0eab59cbeeef2cbad3d4fb156
https://doi.org/10.1039/p19860001669

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X=Y-ZH systems as potential 1,3-dipoles. Cycloadditions of thiominoethers and thioiminocarbonates

Autor: John F. Malone, Deirdre A. Kennedy, Ronald Grigg, S. Thianpatanagul, L.D. Basanagoudar

Publikováno v: Tetrahedron Letters. 23:2803-2806

Thioiminoethers and thioiminocarbonates of α-amino acid esters undergo acetic acid catalysed cycloaddition reaction with N-phenylmaleimide via their 1,3-dipolar tautomers.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0d5ad3f48ee1f53d70b762e769680080
https://doi.org/10.1016/s0040-4039(00)87463-8

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