Tris silane

Oy,Oy-(Methylsilylidyne)-tris(2-butanoneoxime) (see also Methyltris(butanoneoxime)silane. 

Etacelasil. 2-Chloroethyl-tris (2-methoxy-ethoxy)-silane [37894 6-5] (Etacelasd, Alsol) (27) is made by the reaction of three moles of 2-methoxyethanol with one mole of Cl2SiCH2Cl. The name Alsol should not be confused with aluminum acetotartrate, also known as Alsol. Etacelasil is... 

Alkyl silyl ethers are cleaved by a variety of reagents Whether the silicon-oxygen or the carbon-oxygen bond is cleaved depends on the nature of the reagent used Treatment of alkoxysilanes with electrophilic reagents like antimony tri-fluonde, 40% hydrofluonc acid, or a boron tnfluonde-ether complex results in the cleavage of the silicon-oxygen bond to form mono-, di-, and tnfluorosiloxanes or silanes [19, 20, 21) (equations 18-20)... 

In an effort to identify a more stereoselective route to dihydroagarofuran (15), trimethylsilylated alkyne 17 was utilized as a substrate for radical cyclization (Scheme 2). Treatment of 17 with a catalytic amount of AIBN and tri-n-butyltin hydride (1.25 equiv) furnishes a mixture of stereoisomeric vinyl silanes 18 (72% combined yield) along with an uncyclized reduction product (13% yield). The production of stereoisomeric vinyl silanes in this cyclization is inconsequential because both are converted to the same alkene 19 upon protodesiiyiation. Finally, a diastereoselective di-imide reduction of the double bond in 19 furnishes dihydroagaro-... 

Aromatische Carbonsauren mit Elektronendonator-Gruppen lassen sich auch mit Tri-athyl-silan in Trifluoressigsaure/Trifluoressigsaure-anhydrid zu den entsprechenden Koh-lenwasserstoffen reduzieren2. 

Alkohole erhalt man ferner mit Natrium-triathoxy-hydrido-aluminat6, Natrium-bis-[2-methoxy-athoxy]-dihydrido-aluminat7, Lithium-trimethoxy-hydrido-aluminat8, Alu-miniumhydrid9, Diboran10, Natriumboranat/Zinn(IV)-chlorid11 bzw, Triathyl-silan/Tri-fluoressigsaure12 ... 

Heteropolycyclic compounds were obtained [29] by treating bromo furylethers with tris-(trimethylsilyl)silane (TTMSS) in hot toluene containing a catalytic amount of AIBN (Equation 1.12). 

Chatgilialoglu, C. Ferreri, C. Gimisis, T. Tris(trimethylsilyl)silane in organic synthesis. In Rappoport, Z. Apeloig, Y. (Eds.), The Chemistry of Organic Silicon Compounds, Wiley, Chichester, 1998 Vol. 2, Chapter 25, pp. 1539-1579. 

For the use of tris(trimethylsilyl)silane instead, see Giese, B. Kopping, B. Chatgilialoglu,... 

To prepare multifunctionalized symmetric organosilicon compounds by the polyalkylation of benzene. (2-chloroethyi)trichlorosilane and (3-chloropropyl)tri-chlorosilane were reacted with benzene. Polyalkylations of benzene with (2-chloroethyl)silane and (3-chloropropyl)silane were carried out in the presence of aluminum chloride catalyst at a reaction temperature of 80 C. The reaction of benzene with excess (2-chloroethyI )trichlorosilanes afforded pcralkylated product, hexakis(2-(trichlorosilyl)ethyl)benzene in good yield (70%). ... 

As shown in Table XIV, the reactivity of (trichloromethyl)silanes varied depending upon the substituent on silicon. The reactivity and yields of (trichloromethyl)-methyldichlorosilanes were slightly higher than those of (trichloroinethyl)tri-chlorosilanes in the aluminum chloride-catalyzed alkylation as similarly observed in the alkylations with (ai-chloroalkyl)silanes and (dichloroalkyl)silanes. The electron-donating methyl group on the silicon facilitates the alkylation more than the electron-withdrawing chlorine. The minor products, (diphenylmethyl)chloro-silanes, were presumably derived from the decomposition of (triphenylmethyl)-chlorosilanes. 

Finally, reaction of SiCLi. 57 with HMDSO 2 affords 84% tetrakis(trimethyl-silyloxy)silane 140 and 16% hexakis(trimethylsilyloxy)disiloxane 141, both of which might be very interesting silylating agents, e.g., for silicon surfaces [72]. 140 is also obtained in 38% yield on reaction of SiCL. 57 with excess sodium tri-methylsilanolate 96 [73] (Scheme 3.14). 

The diolefin 1064 gives rise to the isoxazoline 1065, which cannot eliminate tri-methylsilanol 4 [122]. Cychzation of the co-nitroolefin 1066 with trimethylchloro-silane (TCS) 14/triethylamine at -35 °C then HCl-induced removal of trimethyl-silanol 4 leads, in 85% yield, to the dimer 1067, which is converted in two more steps into racemic pyrenophorin 1068 [112] (Scheme 7.39). Further cyclizations of co-nitroolefins [109] to monomeric or dimeric isoxazolines have been described. Conjugated dienes such as butadiene afford a mixture of the mono or bis adducts [115-117]. 

Nickel complexes formed in situ by the reaction of NiCl.S-COD) with the iini-dazolium salts IMesHCl or IPrHCl in the presence KO Bu catalyse the hydrosilylation of internal or terminal alkynes with EtjSiH. Interestingly, Ni tri-butylphosphine complexes are inactive in this hydrosilylation reaction. The monosilylated addition products were obtained with slow addition rates of the alkyne in the reaction mixture and were formed with variable degree of stereoselectivity, depending on the type of the alkyne, the silane and the ligand on Ni [50],... 

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