4-methylphenyl trimethylsilyl

Similarly prepared was 4-methylphenyl trimethylsilyl tellurium in 27% yield7. 

Methylphenyl trimethylsilyl tellurium and cadmium dichloride stirred in tetrahydrofuran at 20° for 14 hours, produced cadmium bis 4-methylbenzmetellurolate] as a bright-yellow solid in 32% yield3. The compound decomposed at 200° to cadmium telluride and bis[4-methylphenyl] tellurium. 

Stereostructures of a co-crystal of (li )-l- 4-[(9aA)-perhydropyrido[l,2- ]pyrazin-2-yl]phenyl -2-phenyl-7-hydroxy-l, 2,3,4-tetrahydroisoquinoline with ERa-LBD301-553/C — S triple mutant <2005JME364> and iV-[2-(4-hydroxyphenyl)ethyl]-a-propyl-3-[(4-hydroxyphenyl)methyl]-l,4-dioxo-l,2,3,4,ll,l la-hexahydro-67/-pyrazino[l,2- ]isoquinoline-3-acetamide with fructose-1,6-biphosphatase <2003JBC51176> were determined by X-ray crystallography. The structure of a complex formed from 3-[( -methylphenyl)amino]-4-[(4-methylphenyl)imino]-4//-pyrido[l,2-tf]pyrazine with sodium bis(trimethylsilyl)amide and (norbornadiene)Mo(CO)4 in THF was characterized by single crystal X-ray diffraction <1995JPR38>. 

Treatment of 3-(4-rncthylphcnylarnino)-4-(4-methylphcnylirnino)A//-pyndo[ 1,2- ]pyrazinc 319 (Ar = 4-MeC6H4) with 30% H202 in acetone at 50 °C and with sodium bis(trimethylsilyl)amide and (norbornadiene)Mo(Co)4 in THF gave l-(4-methylphenyl)-2-(2-pyridyl)-4-(4-methylphenylamino)-l, 2-dihydro-57/-imidazol-5-one complex 318 <1995JPR38>. 

Kinetically stabilized germanothiones Tbt(Tip)Ge = S, Tbt(Dis)Ge = S and germanoselones Tbt(Tip)Ge = Se, Tbt(Dis)Ge = Se [Dis = bis(trimethylsilyl) methyl, Tbt = 2,4,6-trisbis(trimethylsilyl)methylphenyl, Tip = 2,4,6-tris(iso-propyl)phenyl], have been synthesized and have shown to enter 1,3-dipolar cycloaddition reactions with mesitonitrile oxide (361). 

Abbreviations Ac acetyl AIBN azobisisobutyronitrile All allyl Bn benzyl Bz benzoyl ClAc chloroacetyl DAST diethylaminosulfur trifluoride DBU l,8-diazabicyclo[5.4.0]-undec-7-ene DDQ 2,3-dichloro-5,6-dicyano-/)-benzoquinone DMDO dimethyldioxirane DMTST dimethyl(methylthio)sulfonium trifluoromethanesulfonate Fmoc 9-fluorenyl-methoxycarbonyl HDTC hydrazine dithiocarboxylate IDCP iodonium di-collidine perchlorate Lev levulinoyl MBz 4-methylbenzoyl Me methyl MEK methyl ethyl ketone MP 4-methoxyphenyl NBS iV-bromosuccinimide NIS A-iodosuccinimide Pent n-pentenyl Pfp pentafluorophenyl Ph phenyl Phth phthaloyl Piv pivaloyl PMB 4-methoxybenzyl TBAF tetrabutylammonium fluoride TBDMS tcrt-butyldimethylsilyl TBDPS tert-butyldiphenylsilyl TCA trichloroacetyl TES triethylsilyl Tf trifluoromethanesulfonyl TMS trimethylsilyl Tol 4-methylphenyl Tr trityl Troc 2,2,2-trichloroethoxycarbonyl Ts tosyl. 

QiHjiOjP, Tris(4-methylphenyl) phosphite ruthenium complex, 26 277, 278 C2 H3,PSi, Phosphine, (2,4,6-tri-tert-butyl-phenyl)(trimethylsilyl)-, 27 238 QsHaiNOP, Benzamide, 2-(diphenylphos-phino)-W-phenyl-, 27 324... 

Ethynyl p-tolyl sulfone Sulfone, ethynyl p-tolyl (8) Benzene, l-(ethynylsulfonyl)-4-methyl- (9) (13894-21-8) p-Tolyl 2-(trimethylsilyl)ethynyl sulfone Silane, trimethyl [[(4-methylphenyl)sulfonyl]ethynyl]- (9) (34452-56-7)... 

W-Bis (4-methoxyphenyl) methyl, 908 W-Bis (4-methoxyphenyl)phenylmethyl, 908 W-Diphenylmethyl, 909 W-Bis (4-methylphenyl)phenylmethyl, 909 W-Bis (4-methoxyphenyl)phenylmethyl, 909 W-Bis (4-methylsulhnylphenyl)methyl, 909 W-Triphenylmethyl, 909 W-9-Phenylfluorenyl, 910 W-Bis(trimethylsilyl)methyl, 910 W-f-Butoxycarbonyl, 910 W-Benzyloxycarbonyl, 911 W-Methoxycarbonyl, 912 W-Ethoxycarbonyl, 912 W-p-Toluenesulfonyl, 912 W-Trimethylsilylethylsulfonyl, 913 W,0-Isopropylidene Acetal, 914 iV,0-Benzylidene Acetal, 914 W,0-Methoxybenzylidene Acetal, 914 W.O-Formylidene Acetal, 915... 

Lithiation in the 2-position of 4-methylphenyl 2-(trimethylsilyl)ethoxymethyl ether in diethyl ether solution by treatment with n-butyllithium at ambient temperature and reaction over 2.5 hours followed by the addition of benzaldehyde led upon work-up to a-[5-methyl-2-(2-trimethylsilyl)ethoxymethylphenyl]benzyl alcohol in an overall yield of 80% (ref.128). 

Si2C,4H26, Benzene. I.2-bis[(trimethyl-silyl)methyl]-, 26 148 Si2C2(H44, Disilene, tetrakis(2,4,6-tri-methylphenyl)-, 29 19,21 Si2Cl2ThC22H42, Thorium(IV), bis(Ti l,3-bis(trimethylsilyl)cyclopentadienylldi-... 

Soto and coworkers have developed chiral polyphosphazene block copolymers (13CEJ5644). Their synthesis starts with consecutive reactions of (trimethylsilyl)phosphorimidoyl trichloride 160 and methylphenyl-phosphorimidoyl chloride 161 monomers (Scheme 42). The polymerization was initiated by phosphazene 159 and gave the polyphosphazenes 162a—c with different ratio of block motifs. The substitution of chlorine atoms by binol was accomplished in the presence of cesium carbonate as a base and the resulting polymers 162a—c isolated in 66—77% yields. 

M A7-butyllithium in hexane added to a stirred suspension of [2-(trimethylsilyl)-ethyl]tris(2-methylphenyl)phosphonium iodide in THF at 0°, the mixture stirred at room temp, for 30 min, and a soln. of nonanal in THF added at 0° - product. Y 91 % (E/Z 3.7 100). Replacing a phenyl group in the ylid by o-methylphenyl improves Z-specificity and reduces silyl rearrangement (except with benzaldehyde and cinnam-aldehyde). F.e.s. H. lio et al., Tetrahedron Letters 29, 5965-8 (1988) review of silicon compds. in organic synthesis s. P. Kochs, Chem.-Ztg. 113, 225-38 (1989). 

Preparation of Ketones. l-[(Trimethylsilyl)methyl]benzo-triazole reacts readily with acyl chlorides to provide the corresponding (benzotriazol-l-yl)methyl ketones in good yields. One example of such reactions is given in eq 1, and similar results are reported for reactions with benzoyl, acetyl, phenylacetyl, and other acyl chlorides. As shown by an example in eq 2, the benzo-triazolyl moiety in (benzotriazol-l-yl)methyl ketones is easily removed by reduction with zinc in acetic acid to provide the corresponding methyl ketones. To prepare higher ketones, lithi-ated l-[(trimethylsilyl)methyl]benzotriazole is alkylated first and then subjected to the regular reactions with acyl chlorides and zinc. Thus, in a reaction of l-[(trimethylsilyl)methyl]benzotriazole with -BuLi followed by benzyl bromide, l-[ l-(trimethylsilyl)-2-phenylethyljbenzotriazole is obtained in 81% yield. Subsequent treatment of this product with 4-methylbenzoyl chloride and then with zinc in acetic acid provides 4-methylphenyl 2-phenylethyl... 

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