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
Imidazol-2-and-4-ylidene by decarboxylation. Studies on the cross-conjugated mesomeric betaine-alkaloid norzooanemonine and its pseudo-cross-conjugated isomer.
TL;DR: Calculations were performed to characterize the different types of conjugation in the imidazolium-carboxylates to prove the structure of which was proved by independent syntheses.
Journal ArticleDOI
Tetracoordinate Boron Intermediates Enable Unconventional Transformations.
TL;DR: In this paper, the authors discuss the recent advances in the development of unconventional transformations of organoboron compounds based on the design of tetracoordinate boron intermediates.
Journal ArticleDOI
Low-Valent Lead Hydride and Its Extreme Low-Field 1H NMR Chemical Shift
TL;DR: The thermolabile dimeric organolead hydride was synthesized at low temperature and features a hydrides 1H NMR signal at the lowest field observed so far for a diamagnetic compound in agreement with quantum chemical predictions.
Journal ArticleDOI
Cleavage of Ru-3(CO)(12) by N-heterocyclic carbenes: Isolation of cisand trans-Ru(NHC)(2)(CO)(3) and reaction with O-2 to form Ru(NHC)(2)(CO)(2)(CO3)
TL;DR: The N-heterocyclic carbenes (NHCs) 1,3-dialkyl-4,5-dimethylimidazol-2-ylidene (alkyl = ethyl, IEt2Me2; isopropyl, IiPr2Me 2) and 1, 3-di-isopropy-dimitriropropy-limidaxyl-2 -ylidenes (IiP2) cleave Ru3(CO)12 at room temperature to give the mononuclear complexes Ru(
Journal ArticleDOI
Iridium complexes with monodentate N-heterocyclic carbene ligands
Gellért Sipos,Reto Dorta +1 more
TL;DR: In this article, a comprehensive overview on synthetic methods available to access NHC-Ir compounds, the stoichiometric activity of the resulting complexes as well as their use in catalysis and other applications is given in the following pages.