- Synthesis and characterization of a free phenylene bis(N-heterocyclic carbene) and its di-Rh complex: Catalytic activity of the di-Rh and CCC-NHC Rh pincer complexes in intermolecular hydrosilylation of alkynes
-
1,3-Bis(3-butylimidazolium-1-yl)benzene diiodide (1) was reacted with Li(2,2,6,6-tetramethylpiperidine) yielding the free bis-carbene, 1,3-bis(3-butylimidazol-2-ylidene-1-yl)benzene (3), which has been spectroscopically characterized. Combining the free b
- Andavan, Gurusamy Thangavelu Senthil,Bauer, Eike B.,Letko, Christopher S.,Hollis, T. Keith,Tham, Fook S.
-
p. 5938 - 5947
(2007/10/03)
-
- Regio- and stereoselective hydrosilylation of terminal alkynes using Grubbs' first-generation olefin-metathesis catalyst
-
Grubbs' first-generation, Ru metathesis complex 3 catalyses the hydrosilylation of terminal alkynes. The reaction exhibits an interesting selectivity profile that is dependent on the reaction concentration and more importantly on the silane employed.
- Arico, Caterina S.,Cox, Liam R.
-
p. 2558 - 2562
(2007/10/03)
-
- Metathesis of silicon-containing olefins. VIII. Synthesis of alkenyl (phenyl, methyl) substituted silanes by olefin metathesis
-
1-Tri(phenyl, methyl)silyl-1-alkenes of the general formula RCH=CHSiMe3-nPhn (where n = 1-3, R = CmH2m+1, m = 5,6,8,10, and 12; Ph) have been prepared by a novel method, viz. by a very effective cross-metathesis of vinyltri(phenyl, methyl)silanes with 1-alkenes and styrene catalyzed by ruthenium and rhodium complexes.A tenfold excess of 1-alkene in the reaction mixture gave stereospecific 1-tri(phenyl, methyl)silyl-1-alkenes (predominantly E-isomers) in high yields of up to 90percent (in turn of vinylsilane).The products were identified by spectroscopic (IR, Raman, 1H, 13C NMR and GC-MS) methods.
- Marciniec, Bogdan,Pietraszuk, Cezary
-
p. 163 - 166
(2007/10/02)
-
- The Silylcupration of Acetylenes: a Synthesis of Vinylsilanes
-
Bis(dimethylphenylsilyl)copper-lithium (1) reacts with hex-1-yne, propyne, acetylene itself, phenylacetylene, and hex-3-yne to give the products of syn addition of the dimethylphenylsilyl group and the copper.The resultant vinylcopper reagents react with a variety of electrophiles, such as the proton, iodine, acyl and alkyl halides, enones, and epoxides, to give vinylsilanes.With the terminal alkynes, the silyl group becomes attached with a high level of regioselectivity to the terminal carbon atom, with the result that the final products are 2,2-disubstituted vinylsilanes.
- Fleming, Ian,Newton, Trevor W.,Roessler, Felix
-
p. 2527 - 2532
(2007/10/02)
-