An efficient and convenient Cu(OAc)2/air mediated oxidative coupling of azoles via C–H activation
作者:Yan Li、Jun Jin、Weixing Qian、Weiliang Bao
DOI:10.1039/b919396k
日期:——
An efficient and convenient approach to construct CâC bonds at the 2-position of azoles via Cu(OAc)2/air mediated oxidative homo- and cross-coupling reaction was reported. The corresponding products were obtained in good to excellent yield.
Reactions of C-imidazolyllithium derivatives with Group Ib compounds: Tris[μ-(1-alkylimidazolato-N3,C2)]tri-gold(I) and -silver(I). Crystal structure of bis(1-benzylimidazolin-2-yliden)gold(I) chloride
作者:Flavio Bonati、Alfredo Burini、Bianca Rosa Pietroni、Bruna Bovio
DOI:10.1016/0022-328x(89)85094-6
日期:1989.10
the species (1-R-2-M-imidazole)n (M Au, R methyl or benzyl, n = 3; M Ag, R = benzyl). From Me2SCuBr the compound bis(1-R-imidazol-2-yl) was obtained (R = methyl or benzyl). The unexpected formation during work up of [Au(H)2]Cl, a carbene derivative, was confirmed by an X-ray crystal structural study which showed the presence of two independent molecules where CAuC is 175.2(4) or 176.6(4)°,
当LMX(M = Au,X = Cl,L = PPh 3或Me 2 S; M = Ag,X = NO 3,L = Me 2 S)与1-R-2-锂咪唑反应时,锂被取代贵金属,得到物质(1-R-2-M-咪唑)ñ(M的Au,R甲基或苄基,ñ = 3; M银,R =苄基)。由Me 2 SCuBr获得化合物双(1-R-咪唑-2-基)(R =甲基或苄基)。X射线晶体结构研究证实了卡宾衍生物[Au(H)2] Cl的后处理过程中意外形成,该研究表明存在两个独立的分子,其中CAuC为175.2(4)或176.6(4)°,平均AuC为2.027(7)Å,在3.2630(5)Å处有Au···Au相互作用。
Zur Darstellung von 1,1′-Bis(phenylmethyl)-2,2′-biimidazol-5,5′-dimethanol
作者:Robert Steffens、Walter Schunack
DOI:10.1002/ardp.19863190216
日期:——
Im Rahmen der Darstellungvon Bishistaminen1), bei denen die Imidazole über beide C‐2 Positionen mittels Alkylen‐ bzw. Phenylenresten miteinander verknüpft sind, wurde auch der Versuch unternommen, H1‐Agonisten vom 2,2′‐Biimidazol‐Typ zu erhalten. Das als Ausgangsverbindung benötigte Carbinol 9a ließ sich nach dem in 1) beschriebenen Verfahren durch Kondensation des Imidsäureesters 1 mit Dihydroxyaceton
Molecular electrostatic potential dependent selectivity of hydrogen bonding
作者:Christer B. Aakeröy、Tharanga K. Wijethunga、John Desper
DOI:10.1039/c4nj01324g
日期:——
A molecular electrostatic potential based approach for anticipating the outcome of hydrogen-bond interactions in a competitive scenario is described.
基于分子静电势的方法描述了一种用于预测在竞争场景中氢键相互作用结果的方法。
Practical crystal engineering using halogen bonding: A hierarchy based on calculated molecular electrostatic potential surfaces
作者:Christer B. Aakeröy、Tharanga K. Wijethunga、John Desper
DOI:10.1016/j.molstruc.2014.02.022
日期:2014.8
electrostatic potential) on the N-heterocycle and the halogen-bonddonor. The supramolecular yield (number of successful co-crystallizations) is 70% for iodine-donors whereas none of the bromo-substituted donors produced a co-crystal which underscores the importance of the magnitude of the electrostatic potential and of the polarizability of the halogen-bonddonor in the context of successful practical crystal