Výsledky vyhledávání - "Janice J. Byrne"

Sc(BINOL)2Li: a new heterobimetallic catalyst for the asymmetric Strecker reaction

Autor: Yannick Vallée, Murielle Chavarot, Pierre Y. Chavant, Janice J. Byrne

Publikováno v: Tetrahedron: Asymmetry. 12:1147-1150

The new chiral heterobimetallic complex Sc(BINOL) 2 Li 1 was prepared and used as a catalyst in the enantioselective addition of a cyanide source (HCN or TMSCN) to several imines. High conversion rates and enantiomeric excesses (e.e.s) as high as 95%

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fe088eb4a72f72d1632bbfb2c5b4ebdc
https://doi.org/10.1016/s0957-4166(01)00144-6

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Three coordinate divalent Group 14 element compounds with a β-diketiminate as supporting ligand L2MX [L2=PhNC(Me)CHC(Me)NPh, X=Cl, I; M=Ge, Sn]

Autor: Isabelle Saur, Aman Akkari, Jacques Barrau, Janice J. Byrne, Heinz Gornitzka, Ghassoub Rima

Publikováno v: Journal of Organometallic Chemistry. 622:190-198

The new heteroleptic divalent germanium and tin compounds L2MX [L2=PhNC(Me)CHC(Me)NPh. X=Cl; M=Ge (1), Sn (2). X=I; M=Ge (3), Sn (4)] have been synthesized and physicochemically and structurally (2) characterized. The halide ligand of all compounds c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f6535d7cd921c1c7bcb1ad0847bb5779
https://doi.org/10.1016/s0022-328x(00)00893-7

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Asymmetric Strecker reactions of ketimines catalysed by titanium-based complexes

Autor: Murielle Chavarot, Janice J. Byrne, Pierre-Yves Chavant, Yannick Vallée

Publikováno v: Tetrahedron Letters. 41:873-876

The asymmetric addition of TMSCN to a ketimine has been achieved by use of catalytic quantities of chiral titanium(IV) complexes. Fast conversions together with enantiomeric excesses as high as 59% have been achieved.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8608a174b67f3602e95ccb954f4a7c5d
https://doi.org/10.1016/s0040-4039(99)02215-7

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Novel acetylene-linked di-cobalt and tetra-cobalt carbonyl clusters

Autor: Elise Champeil, Sylvia M. Draper, Janice J. Byrne, Marika Delamesiere, Brendan Twamley, Conor Long

Publikováno v: Scopus-Elsevier

{Co2(CO)6} groups were attached to p-diethynylbenzene-based acetylenes giving complexes of general formula [{Co2(CO)6}(μ2-η2:2-RC2C6H4C2R′)] ((4): R=R′=H; (4a): R=SiMe3, R′=H; (4b): R=R′=SiMe3); [{Co2(CO)6}2(μ4-η2:2:2:2-RC2C6H4C2R′)] ((

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::adcebdee7db7c3945618897990e23435
https://doi.org/10.1016/s0022-328x(99)00399-x

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Self-organization of ligands in multi-component titanium catalysts for the enantioselective ene reaction of glyoxylates

Autor: Pierre Y. Chavant, Murielle Chavarot, Janice J. Byrne, Josephine Pardillos-Guindet, Yannick Vallée

Publikováno v: Tetrahedron: Asymmetry. 9:3889-3894

Addition of conformationally flexible biphenols to ( R )-BINOL–Ti(O i Pr) 2 , forms a new catalytic species with which ee s are as high as 97.3% in the hetero-ene reaction of n -butyl glyoxylate to α-methyl styrene.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b6677e78e0867d474c4c68e4b49a4535
https://doi.org/10.1016/s0957-4166(98)00384-x

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Preparation of tris[(R)-(3-aza-4-oxo-5-hydroxy-5-phenyl-pent-1-yl)]amine and structural investigation of its dihydrate

Autor: Pierre Y. Chavant, Marie-Thérèse Averbuch-Pouchot, Yannick Vallée, Janice J. Byrne

Publikováno v: Comptes Rendus de l'Académie des Sciences - Series IIC - Chemistry. 1:75-81

A C3 symmetric triol was synthesized from mandelic acid. Its dihydrate, C30H36N4O6·2H2O, is monoclinic with the following unit-cell dimensions: a = 8.518(1), b = 16.703(5), c = 10.742(3) A, β = 100.93(2)∘. The space group is P21 and Z = 2. The cr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e405939dfd27edcfc11ecfb47b801f22
https://doi.org/10.1016/s1251-8069(97)86264-1

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Molecular structure and crystal organization of neutral and ionic derivatives of [M4(CO)12](M = Co, Rh or Ir) clusters and a bonding study by extended-Hückel calculations

Autor: Fabrizia Grepioni, Maria José Calhorda, Janice J. Byrne, Dario Braga

Publikováno v: J. Chem. Soc., Dalton Trans.. :3287-3296

The molecular and crystal structures of neutral and ionic derivatives of [M4(CO)12](M = Co, Rh or Ir) clusters have been studied by a combined use of molecular-orbital calculations of the extended-Huckel type and packing analysis. The problem of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cba4b55f7d6f8d7218c1d1a223a97c71
https://doi.org/10.1039/dt9950003287

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ChemInform Abstract: A Dithioxo-bishydroxylaminomolybdenum Complex as Sulfur and Nitrogen Transfer Reagent. Synthesis of Thioureas from Isonitriles

Autor: Yannick Vallée, Janice J. Byrne

Publikováno v: ChemInform. 30

Cis -dithioxo-bis(( N,N -diethyl)hydroxylamido(1-)- O,N )molydenum(VI) reacts with isonitriles to give the corresponding N,N -diethylthioureas. A mechanism is proposed for this S,N-transfer reaction.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e45b4fbf64cbd613e99b05c7e5d16e0d
https://doi.org/10.1002/chin.199918085

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