Journal ArticleDOI
Synthesis of Imidazol-2-ylidenes by Reduction of Imidazole-2(3H)-thiones
Norbert Kuhn,Thomas Kratz +1 more
Reads0
Chats0
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
Citations
More filters
Journal ArticleDOI
C−H Activation with Elemental Sulfur: Synthesis of Cyclic Thioureas from Formaldehyde Aminals and S8
TL;DR: The C-H activation of cyclic formaldehyde aminals LCH2 with S8 proceeds at unusually low temperatures and results in the formation of the respective thioureas LC=S and H2S, which constitutes a new, solvent-free method for the synthesis of thiOUreas that eliminates the toxic and highly flammable CS2.
Journal ArticleDOI
Carbenes with ferrocenyl substituents
TL;DR: In this article, the reactivity of carbenes containing ferrocenyl substituents is explored, and the spectroscopic, structural and electrochemical properties of the carbene derivatives are discussed.
Journal ArticleDOI
The Generation of a Metallocene‐Fused Imidazol‐2‐ylidene and Its Mercury Complex
Journal ArticleDOI
Weak interionic interactions in 2-bromoimidazolium derivatives
TL;DR: The 2-bromoimidazolium bromide [ImBr]Br (5, Im=2,3-dihydro-1, 3-diisopropyl-4,5-dimethylimidazolate-2-ylidene) is prepared from Im (4) and bromine as mentioned in this paper.
Journal ArticleDOI
TADDOL-Derived Cationic Phosphonites: Toward an Effective Enantioselective Synthesis of [6]Helicenes via Au-Catalyzed Alkyne Hydroarylation
Leo D. M. Nicholls,Maximilian Marx,Thierry Hartung,Elisa González-Fernández,Christopher Golz,Manuel Alcarazo +5 more
TL;DR: In this article, a series of cationic phosphonites, all sharing a TADDOL skeleton but decorated with different positively charged substituents at phosphorus, were synthesized and tested as chiral ancillary ligands on the Au-catalyzed intramolecular hydroarylation of appropriate diynes toward carbo[6]helicenes with different substitution patterns.