- Unexpected Photodegradation of a Phosphaketenyl-Substituted Germyliumylidene Borate Complex
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The first zwitterionic borata-bis(NHC)-stabilized phosphaketenyl germyliumylidene [(L2(O=C=P)Ge:] 2 (L2=(p-tolyl)2B[1-(1-adamantyl)-3-yl-2-ylidene]2) has been synthesized by salt-metathesis reaction of [L2
- Xiong, Yun,Yao, Shenglai,Szilvási, Tibor,Ballestero-Martínez, Ernesto,Grützmacher, Hansj?rg,Driess, Matthias
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- High-thermal-stability and migration-resistant organic light-emitting material as well as preparation method and application thereof
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The invention provides a high-thermal-stability and migration-resistant organic luminescent material and a preparation method and application thereof. The structure of the high-thermal-stability and migration-resistant organic luminescent material is [X(M
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Paragraph 0102; 0104
(2020/05/05)
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- IMIDAZOLIUM SALT AND MANUFACTURING METHOD THEREFOR
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PROBLEM TO BE SOLVED: To provide an imidazolium salt capable of replacing N,N'-bis(1-adamantyl)imidazolium salt, and a manufacturing method therefor and a manufacturing method of zeolite using the imidazolium salt. SOLUTION: There is provided an imidazoli
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Paragraph 0196-0199
(2019/10/05)
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- Synthesis and characterization of gold(I) complexes of dibenzotropylidene-functionalized NHC ligands (Trop-NHCs)
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Gold(I) complexes of dibenzotropylidene-functionalized N-heterocyclic carbene ligands (Trop-NHCs) have been prepared in order to investigate their structural features and to reveal possible interactions of the olefin unit with the metal center. The precursor imidazolium chloride salts (R-1) were generated in a single step using N-substituted imidazoles (R = H, Me, DiPP, Ad) and 1 or 2 equiv of Trop-Cl, generating unsymmetrical and symmetrical NHC-olefin hybrids. The structural parameters of the ligands were determined by synthesis and X-ray diffraction analysis of their corresponding gold(I) chloride complexes, revealing highly flexible steric demands of the Trop unit. Conversion of these complexes with halide-abstracting reagents such as AgNTf2 and NaBArF24 cleanly gave neutral, NTf2-coordinated complexes of the type [(NHC)Au(NTf2)] (R-3) and the cationic bis-NHC-coordinated complexes [(NHC)2Au]BArF24 (R-4), respectively. The Gagosz-type complexes R-3 were further tested in the hydration of diphenylacetylene, showing a clear trend in activity depending on the ligand's sensitivity to hydrolysis.
- Brill, Marcel,Collado, Alba,Cordes, David B.,Slawin, Alexandra M. Z.,Vogt, Matthias,Grützmacher, Hansj?rg,Nolan, Steven P.
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supporting information
p. 263 - 274
(2015/01/30)
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- Solvent-free and direct C(sp3)-H amination of adamantanes by grinding
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A facile, direct and environmentally benign conversion of C(sp 3)-H bonds to C(sp3)-N bonds using substoichiometric amount of aprotic superelectrophiles polyhalomethane-AlX3 has been achieved by grinding under solvent-free
- Wei, Zhen,Li, Jiarong,Wang, Ning,Zhang, Qi,Shi, Daxin,Sun, Kening
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supporting information
p. 1395 - 1400
(2014/02/14)
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- Isoprene as lithiation mediator: Synthesis of 2-substituted 1-alkylimidazole derivatives
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The lithiation of different imidazoles bearing a primary (i.e., butyl, pentyl, dodecyl) or secondary (i.e., cyclohexyl, 1-methylheptyl) alkyl substituent on the nitrogen has been successfully achieved by means of an isoprene-mediated protocol. The subsequent reaction of the 2-lithioimidazole intermediates with different electrophiles leads to the formation of interesting 1,2-disubstituted imidazoles. Georg Thieme Verlag Stuttgart · New York.
- Martinez, Regina,Torregrosa, Rosario,Pastor, Isidro M.,Yus, Miguel
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experimental part
p. 2630 - 2638
(2012/09/07)
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- Effects of a flexible alkyl chain on a ligand for CuAAC reaction
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Imidazole derivatives substituted by a normal alkyl group are shown to be efficient as a ligand for the copper(Δ)-catalyzed azide-alkyne cycloaddition (CuAAC) reaction. An alkyl chain on the imidazole ligands shows an efficient steric effect and benefits the reaction. Such functionalities of an alkyl chain allow a rapid CuAAC reaction of even a bulky alkyne, which has been difficult to perform under conventional conditions.
- Asano, Keisuke,Matsubara, Seijiro
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supporting information; experimental part
p. 4988 - 4991
(2010/12/25)
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- Optically active iridium imidazol-2-ylidene-oxazoline complexes: Preparation and use in asymmetric hydrogenation of arylalkenes
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This work explores the potential of iridium complexes of the N-heterocyclic carbene oxazoline ligands 1 in asymmetric hydrogenations of arylalkenes. The accessible carbene precursors, imidazolium salts 2, and robust iridium complexes 5 facilitated a disco
- Perry, Marc C.,Cui, Xiuhua,Powell, Mark T.,Hou, Duen-Ren,Reibenspies, Joseph H.,Burgess, Kevin
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p. 113 - 123
(2007/10/03)
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- Adamantylation of imidazoles and benzimidazole
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For the first time is reported on substitution of a hydrogen atom in position 4 of the imidazole ring with an aliphatic substituent occurring in reaction between 1-bromoadamantane and imidazoles. The reaction proceeds alongside the substitution in position 1 at heating in excess imidazole. In o-dichlorobenzene solution adamantylation of benzimidazole afforded 1-(1-adamantyl)benzimidazole and 1,3-di(1-adamantyl)-benzimidazolium bromide. The specific features of the reactions course are described. The structure of compounds obtained is proved by 1HNMR spectroscopy.
- Raenko,Korotkikh,Pekhtereva,Shvaika
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p. 1153 - 1157
(2007/10/03)
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- Synthesis and in vitro antiviral activity of some N-adamantylazoles and benzazoles
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Some new N-adamantyl derivatives of five-membered and benzo fused five-membered π-excessive heteroaromatic compounds were synthesized and tested as antiviral agents against Semliki Forest Virus (SFV). The 2-(1-adamantyl)-1,2,3,4-tetrazole derivative was as active as and significantly less toxic than amantadine itself.
- Gonzalez,Alarcon,Cabildo,et al.
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p. 359 - 362
(2007/10/02)
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