Journal ArticleDOI
Synthesis of Imidazol-2-ylidenes by Reduction of Imidazole-2(3H)-thiones
Norbert Kuhn,Thomas Kratz +1 more
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In this article, an improved synthesis of the title compounds was reported, and the N,N'-dialkylthioureas 1 with 3-hydroxy-2-butanone gave the imidazole-2(3H)-thiones 2 which on treatment with potassium in boiling tetrahydrofuran give the IMidazol-2ylidenes 3 in excellent yieldsAbstract:
An improved synthesis of the title compounds is reported. Reaction of the N,N'-dialkylthioureas 1 with 3-hydroxy-2-butanone gives the imidazole-2(3H)-thiones 2 which on treatment with potassium in boiling tetrahydrofuran give the imidazol-2-ylidenes 3 in excellent yieldsread more
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Journal ArticleDOI
Heterozyklen als liganden: XX. Spektroskopische und strukturelle charakterisierung von pentacarbonylmetall-komplexen der imidazol-2-ylidene☆
TL;DR: The imidazol-2-ylidene complexes I and II were obtained from M(CO)6 (M Cr, Mo, W) and the corresponding imidazeldazol 2-ylidenes in good yields as discussed by the authors.
Journal ArticleDOI
Synthesis and Reactivity of Ru(PPh3)3(CO)HF and the N-Heterocyclic Carbene Derivatives Ru(NHC)(PPh3)2(CO)HF
TL;DR: The reaction of Ru(PPh3)3(CO)H2 with excess Et3N·3HF at elevated temperature affords the hydride fluoride complex Ru(pPh3)-3-CO)HF (1) as mentioned in this paper, which reacts with a series of N-heterocyclic carbenes (NHCs) at ambient temperature to form the mono-NHC products Ru(NHC), PPh3), 3-COH2, and Ru(IiPr2Me2)2(PCH2)-CO)
Journal ArticleDOI
Recent advances in annellated NHCs and their metal complexes
TL;DR: In this paper, the effects of annellation on the ligand behavior of NHCs and the catalytic utility of metal complexes featuring these annellated carbenes, along with a host of other promising applications, are described.
Journal ArticleDOI
Synthesis and Reaction of MnII Iodides Bearing the β-Diketiminate Ligand: the First Divalent Manganese N-Heterocyclic Carbene Complexes [{HC(CMeNAr)2}MnI{C[N(iPr)CMe]2}] and [{HC(CMeNAr)2}MnNHAr{C[N(iPr)CMe]2}] (Ar = 2,6-iPr2C6H3)
Jianfang Chai,Hongping Zhu,Kerstin Most,Herbert W. Roesky,Denis Vidovic,Hans-Georg Schmidt,Mathias Noltemeyer +6 more
TL;DR: In this paper, the manganese mono-iodide [HC(CMeNAr)2]MnI(THF) (Ar = 2,6-iPr2C6H3) (3) was prepared in good yield from the reaction of [HCNAr]K with MnI2 in THF.
Journal ArticleDOI
Selective Initiation from Unprotected Aminoalcohols for the N-Heterocyclic Carbene-Organocatalyzed Ring-Opening Polymerization of 2-Methyl-N-tosyl Aziridine: Telechelic and Block Copolymer Synthesis
Camille Bakkali-Hassani,Clément Coutouly,Tassilo Gleede,Joan Vignolle,Frederik R. Wurm,Stéphane Carlotti,Daniel Taton +6 more
TL;DR: In this article, commercial amino alcohols, namely, 2-(methyl amino)ethanol (1) and diethanolamine (2), are investigated as direct initiators, i.e., with no need of protection of the hydroxyl groups, for the N-heterocyclic carbene-organocatalyzed ring-opening polymerization (NHC-OROP) of 2-methyl-Np-toluenesulfonyl aziridine.