Iron catalyzed oxidative assembly of N-heteroaryl and aryl metal reagents using oxygen as an oxidant
作者:Kun Ming Liu、Lian Yan Liao、Xin Fang Duan
DOI:10.1039/c4cc08494b
日期:——
An equivalent amount of N-heteroaryl and aryl Grignard or lithium reagents, after mediation by an equivalent of titanate, was facilely coupled to furnish N-heteroaryl-aryl compounds under the catalysis of FeCl3/TMEDA at ambient temperature usingoxygen as an oxidant. Most of the common N-heteroaryls were all good candidates, and thus provided a general, green and pratical protocol for the flexible
Catalytic Arylation of a CH Bond in Pyridine and Related Six-Membered N-Heteroarenes Using Organozinc Reagents
作者:Isao Hyodo、Mamoru Tobisu、Naoto Chatani
DOI:10.1002/asia.201100971
日期:2012.6
Despite significant advances in the catalytic direct arylation of heteroarenes, the application of this reaction to pyridines has been met with limited success. An oxidative nucleophilic arylation strategy has been developed to overcome this problem. Pyridine, pyrazine, quinolone, and related electron‐deficient N‐heteroarenes can be arylated at the most electrophilic site using the developed nickel‐catalyzed
presence of [HNEt3][HFe3(CO)11] as a water‐reduction catalyst (WRC) and triethylamine as a sacrificial reductant (SR), seven of the new iridium complexes showed activity. [Ir(6‐iPr‐bpy)(ppy)2]PF6 (bpy: 2,2′‐bipyridine, ppy: 2‐phenylpyridine) turned out to be the most efficient photosensitiser. This complex was also tested in combination with other WRCs based on rhodium, platinum, cobalt and manganese. In
The intramolecular aryl embrace: from light emission to light absorption
作者:Biljana Bozic-Weber、Edwin C. Constable、Catherine E. Housecroft、Peter Kopecky、Markus Neuburger、Jennifer A. Zampese
DOI:10.1039/c1dt11052g
日期:——
6-(1-Methylpyrrol-2-yl)-2,2′-bipyridine, 3, and 6-(selenophene-2-yl)-2,2′-bipyridine, 4, have been prepared and characterized in solution and by structural determinations. Copper(I) complexes [CuL2][PF6] in which L is 2,2′-bipyridine substituted in the 6-position by furyl, thienyl, N-methylpyrrolyl, selenopheneyl, methyl or phenyl, (L = 1–6) have been synthesized. The complexes have been characterized
N,C “Rollover” Cyclometalated Platinum(II) Hydrides: Mono- and Polynuclear Derivatives
作者:Giovanni Minghetti、Sergio Stoccoro、Maria Agostina Cinellu、Giacomo Luigi Petretto、Antonio Zucca
DOI:10.1021/om800027g
日期:2008.7.1
cyclometalated platinum(II) hydrides were obtained by reaction of the “rollover” derivatives [Pt(N′−C(3))(Cl)(L)] (N−CH= 6-tert-butyl- and 6-phenyl-2,2′-bipyridine; L = DMSO, 3,5-Me2-pyridine, PPh3) with Na[BH4]. Mono- or polynuclear hydrides, [Pt(N′−C(3))(H)(L)] or [Pt(N′−C(3))(μ-H)]n, are formed depending on the nature of the neutral ligand, L. The unsaturated 14-electron fragments [Pt(N′−C(3))(μ-H)] assemble
通过“侧翻”衍生物[Pt(N'-C(3))(Cl)(L)](N-CH = 6-叔丁基-和6 -苯基-2,2'-联吡啶; L = DMSO,3,5-Me 2-吡啶,PPh 3),具有Na [BH 4 ]。单核或多核的氢化物,[PT(N'-C(3))(H)(L)]或[PT(N'-C(3))(μ-H)] Ñ,形成取决于性质不饱和的14电子片段[Pt(N'-C(3))(μ-H)]组装形成带有桥联氢化物的低聚物。光谱表征为溶液(1 H NMR)和气相(ESI-MS)中的四聚体提供了证据。在四聚体系统中,2e-3c Pt-H-Pt键被π-受体配体(例如Ph 3)裂解P和CO生成稳定的单核氢化物。