Journal ArticleDOI
Synthesis of Imidazol-2-ylidenes by Reduction of Imidazole-2(3H)-thiones
Norbert Kuhn,Thomas Kratz +1 more
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TLDR
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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Stabilization of a Transient Diorganogermylene by an N-Heterocyclic Carbene
TL;DR: In this article, the synthesis of a carbene-stabilized transient germylene is presented, and the resulting complex liberates free germylenes upon heating, forms a stable adduct with BH3, and reacts with MeLi to displace the free free Germylene.
Journal ArticleDOI
Recent developments in the chemistry of 1,3,2-diazaborolines-(2,3-dihydro-1H-1,3,2-diazaboroles)
TL;DR: In this paper, the 2p z -orbital on the boron center with the π* orbital of attached organic π-systems proved to be responsible for unique absorption and emission characteristics of 1,3,2-diazaborolinyl functionalized biphenyls, thiophenes, and dithiophenses.
Journal ArticleDOI
Wann und wie dimerisieren Diaminocarbene
TL;DR: In this paper, the Dimerisierung von einfachen Funf-and Sechsringdiaminocarbenen um 100 kJ mol−1 weniger begunstigt ist als die der acyclischen Pendants.
Journal ArticleDOI
Synthesis of New Iridium N-Heterocyclic Carbene Complexes Bearing a Functionalized Cp* Ligand and Their High Catalytic Activities in the Oppenauer-Type Oxidation of Alcohol
TL;DR: In this paper, the new iridium N-heterocyclic carbene complexes Cp*NIr(IMeMe)Cl2 and Cp *NIrCl2 (Cp*N = η5-1-[2-(dimethylamino)ethyl]-2,3,4,5-tetramethylcyclopentadienyl; IMeMe = 1,3-dimethylimidazol-2-ylidene, 2.2]-2.
Journal ArticleDOI
Reaction of 1,3‐Dialkyl‐4,5‐dimethylimidazol‐2‐ylidenes with 2‐Bromo‐2,3‐dihydro‐1H‐1,3,2‐diazaboroles (Alkyl=iPr and tBu)
TL;DR: In this article, a cyclocondensation reaction of the corresponding dilithiated RN:CR1CR1:NR with BBr3 in hexane was conducted in ether solvents, and the diboroxane II resulted as the main product.