Výsledky vyhledávání - "Jose E. D. Martins"

A Straightforward Synthesis of Enantiopure (1S,2R)-Ephenamine

Autor: Jose E. D. Martins, Arthur C. C. Velho

Publikováno v: Journal of the Brazilian Chemical Society v.31 n.12 2020
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Journal of the Brazilian Chemical Society, Volume: 31, Issue: 12, Pages: 2462-2469, Published: 14 DEC 2020

An enantioselective six-step synthesis of (1S,2R)-ephenamine starting from readily available chiral amino acid is disclosed presenting 26% overall yield and high optical purity. The use of chiral phenylglycine as starting material was also studied an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c29520ec14f0014455f2323f4bef2e6
https://doi.org/10.21577/0103-5053.20200121

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Akademický článek

SYNTHESIS OF CHIRAL 1,5-DIAMINES DERIVED FROM (R)-(+)-CAMPHOR

Autor: José E. D. Martins, Luciana J. Kray, Greice M. dos Santos

Publikováno v: Química Nova, Vol 47, Iss 7 (2024)

In this work we described the synthesis and characterization of a series of novel chiral 1,5-diamines derived from (R)-(+)-camphor through simple procedures in moderate to good yields. These new enantiopure compounds constitute a new family of chiral

Externí odkaz: https://doaj.org/article/3a68950e3243469cab703e129308692f

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Developing asymmetric iron and ruthenium-based cyclone complexes; complex factors influence the asymmetric induction in the transfer hydrogenation of ketones

Autor: Jonathan Hopewell, Jamie Godfrey, Tarn C. Johnson, Martin Wills, Jose E. D. Martins

Publikováno v: Org. Biomol. Chem.. 10:134-145

The preparation of a range of asymmetric iron and ruthenium-cyclone complexes, and their application to the asymmetric reduction of a ketone, are described. The enantioselectivity of ketone reduction is influenced by a single chiral centre in the cat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43989179beb719fc439719c501abf5ec
https://doi.org/10.1039/c1ob06010d

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Applications of N′-alkylated derivatives of TsDPEN in the asymmetric transfer hydrogenation of CO and CN bonds

Autor: Miguel A. Contreras Redondo, Martin Wills, Jose E. D. Martins

Publikováno v: Tetrahedron: Asymmetry. 21:2258-2264

Arene/Ru(II) complexes of (R,R)-N-alkyl-TsDPEN ligands are effective in the asymmetric transfer hydrogenation of ketones and imines in formic acid/triethylamine solution. The complex derived from the N'-Bn derivative of TsDPEN reduces monocyclic imin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2f8f4ef1c629636e0f7d0b4a75322c60
https://doi.org/10.1016/j.tetasy.2010.07.013

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Ir(III) complexes of diamine ligands for asymmetric ketone hydrogenation

Autor: Martin Wills, Jose E. D. Martins

Publikováno v: Tetrahedron. 65:5782-5786

The use of a combination of IrCl3 with a series of ligands derived from the C2-symmetric diamine diphenylethanediamine (DPEN) forms a catalyst capable of the asymmetric hydrogenation of ketones in up to 85% ee.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::977c64779ff880e44e7189194189645c
https://doi.org/10.1016/j.tet.2009.05.012

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Asymmetric hydrogenation of ketones using Ir(III) complexes of N-alkyl-N’-tosyl-1,2-ethanediamine ligands

Autor: Jose E. D. Martins, David J. Morris, Martin Wills

Publikováno v: Tetrahedron Letters. 50:688-692

The combination of an enantiomerically pure N′-alkylated derivative of N -4-toluenesulfonyl-1,2-diphenylethane-1,2-diamine (TsDPEN) with iridium trichloride results in the formation of a catalyst with high selectivity for ketone hydrogenation. Prod

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6c4333f3ce3336a5ad2d03d0388a43a9
https://doi.org/10.1016/j.tetlet.2008.11.101

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Ru(II) Complexes of N-Alkylated TsDPEN Ligands in Asymmetric Transfer Hydrogenation of Ketones and Imines

Autor: Jose E. D. Martins, Martin Wills, Guy J. Clarkson

Publikováno v: Organic Letters. 11:847-850

N-Alkylated TsDPEN derivatives bearing a small alkyl group act as highly efficient ligands in Ru(II) complexes for the asymmetric transfer hydrogenation of imines and ketones. A larger alkyl group serves to significantly reduce the activity of the ca

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4376227c0276e8d9d2873555270f1e6d
https://doi.org/10.1021/ol802801p

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Asymmetric Transfer Hydrogenation of CO and CN Bonds by Tethered RhIIICatalysts

Autor: Daljit S. Matharu, Jose E. D. Martins, Martin Wills

Publikováno v: Chemistry - An Asian Journal. 3:1374-1383

Rh(III) catalysts containing a tetramethylcyclopentadienyl group linked by a 'tether' to a tosylated diamine ligand have previously been reported by our group for the asymmetric transfer hydrogenation (ATH) of ketones. The extension of these catalyst

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ae89c39546c8feac4f7765651410de0
https://doi.org/10.1002/asia.200800189

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Synthesis of a series of novel N,N-dialkyl-TsDPEN ligands and their application to enantioselective addition of dialkylzinc to benzaldehyde

Autor: Jose E. D. Martins, Martin Wills

Publikováno v: Tetrahedron: Asymmetry. 19:1250-1255

A series of mono- and dialkylated derivatives of C2-symmetric N-tosyl-1,2-diphenylethylene diamines have been prepared and used as ligands for the enantiomeric control of the addition of diethylzinc to aldehydes. Addition products of up to 79% ee wer

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7a11904a21802faa89d288209de75951
https://doi.org/10.1016/j.tetasy.2008.04.020

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