Pd-catalyzed synthesis of allylsilanes from chlorosilanes and allyl ethers is described. The reaction proceeds efficiently at room temperature by the use of phenyl or vinyl Grignard reagent in the presence of palladiumcatalysts. The present method can also be applied to synthesis of propargylsilanes by the use of propargyl ethers.
Silicon in organic synthesis. Stereoselective synthesis of some insect sex pheromones
作者:T.H. Chan、K. Koumaglo
DOI:10.1016/0022-328x(85)87361-7
日期:1985.4
stereo-selectively the γ-product with trans-stereochemistry at the double bond. The trans-vinylsilanes are transformed stereoselectively to Z-vinyl iodides. Coupling of the vinyl iodides with organometallic reagents gives Z-alkenes. This approach has been applied to the synthesis of several insect sexpheromones.
Titanocene-Catalyzed Carbosilylation of Alkenes and Dienes Using Alkyl Halides and Chlorosilanes
作者:Shinsuke Nii、Jun Terao、Nobuaki Kambe
DOI:10.1021/jo000483p
日期:2000.8.1
A new method for regioselective carbosilylation of alkenes and dienes has been developed by the use of a titanocene catalyst. This reaction proceeds efficiently at 0 degrees C in THF in the presence of Grignardreagents by the combined use of alkyl halides (R'-X, X = Br or Cl) and chlorotrialkylsilanes (R3''Si-Cl) as the alkylating and silylating reagents, respectively. Terminal alkenes having aryl
Titanocene-catalyzed formation of allylsilanes from allyl ethers and chlorosilanes
作者:Shinsuke Nii、Jun Terao、Nobuaki Kambe
DOI:10.1016/j.tetlet.2003.12.101
日期:2004.2
A new method for silylation of allyl ethers with chlorosilanes has been developed by the use of Cp2TiCl2 as a catalyst. This reaction proceeds efficiently at −20 °C in THF using nBuMgCl. A plausible reaction pathway via allyltitanocene intermediate was proposed.
A direct and simple catalytic coupling of nonfluorinated and fluorinated silylbutenamides with β-CF3 α,β-unsaturated esters mediated by fluorideion was carried out. The transformation proceeded with excellent yields to afford new, highly functionalized trifluoromethylated and quaternary fluorinated products.