4-trimethylsilylphenyl

S-Methacryloyloxy-ljl -biadamantane, MBA, (Scheme 4) was efficiently polymerized anionically using [ l,l-bis(4/-trimethylsilylphenyl)-3-methylpen-lyl]lithium as the initiator, prepared in situ by the reaction of s-BuLi with l,l-bis(4-trimethylsilylphenyl)ethylene [17]. The polymerization took place at - 50 °C in order to avoid the solubility problems of the monomer, observed at - 78 °C. Narrow molecular weight distribution block copolymers of rather low molecular weights of PMBA with fBuMA and (2,2-dimethyl-... 

Bis[trimethylsilyl]benzene reacted with one or two molar equivalents of tellurium tetrachloride in refluxing 1,2-dichlorobenzene with replacement of one or both of the trimethylsilyl groups by Irichlorotelluro groups. 4-Trimethylsilylphenyl tellurium trichloride and tellurium tetrachloride produced 1,4-bis[trichIorotelluro]benzenes. 

Carbonyl- r-cyclopentadienyl(tris(4-trimethylsilylphenyl)phosphine)cobalt... 

Synonym Carbonyl(r7 -cyclopentadienyl) [tris(4-trimethylsilylphenyl)phosphine] cobalt Source Montilla, R Galindo, A. Rosa,... 

Methylphenyl-Tg (4-tolyl-Tg), 4-(l-methylethyl)lphenyl-Tg (4-i-PrPh-Tg), and (4-trimethylsilylphenyl)-Tg (4-TMSPh-Tg) were obtained by direct acidic hydrolysis of (4-tolyl)triehoxysilane, (4-i-PrPh)triehoxysilane, and (4-TMSPh)triethoxysilane in the presence of hydrochloric acid as shown in Scheme 4.13. 

Trifluoromethanesulfonic anhydride in chloroform added over 7 h to a stirred soln. of 2-(4-trimethylsilylphenyl)prop-l-ene, N-acetyl-cw-2,6-dimethylmorpholine, and lutidine in chloroform at reflux, the mixture cooled to room temp., treated with tetra-/i-butylammonium trihydridocyanoborate, and allowed to react for 16 h - (Z)-3-(4 - trimethylsily Iphenyl) - 3 - methyl -1 - [4 - (cis - 2,6 - dimethylmorpholino)]cyclo-butane. Y 46% [with 22% (E)-isomer]. F.e. and with NaBHjCN/Aliquat 336 s. C.J. Urch, G.C. Walter, Tetrahedron Letters 29, 4309-12 (1988). 

Physical Data bis(4-trimethylsilylphenyl) disulfide is a colorless solid, mp 47-48 °C (hexane), and bis(4-trimethylsilyl-phenyl) diselenide is a yellow solid, tip 45 °C. 

Also obtained by Fries rearrangement of 4-trimethylsilylphenyl acetate with aluminium chloride without solvent at 140° (60%) [2178]. 

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