Phenyldimethyl silane

The catalytic reaction giving allenes by the addition of a hydrosilane twice to 1,3-diynes65 has been applied to the asymmetric synthesis of axially chiral allenylsilanes although the selectivity and scope of this reaction are relatively low. A chiral rhodium complex coordinated with (23, 43 )-PPM is the best catalyst for the addition of phenyldimethyl-silane to diyne 52 giving allene 53 with 22% ee (Scheme 14).66 663... 

Methyl 2,3,4-tri-0-benzyl-7-(phenyldimethyl)silane-7-deoxy-L-g/ycero-a-D-manno-heptopyranoside (170]... 

In the presence of a Pt complex like bis( j-divinyltetramethyl-disiloxane)tri-t-butylphosphineplatinum(0) (4), phenyldimethyl-silane reacts with l-butyn-3-ol to give an 8 1 mixture of alkenylsilanes (5 and 6) (eq 3). The major product 1-dimethyl-phenylsilyl- l-buten-3-ol (5) is separated and resolved by hpase-catalyzed esterification. ... 

Bromoform heated lOhrs. at 80° with 0.5 equivalent triethylsilane and a catalytic amount of benzoyl peroxide in a sealed tube methylene dibromide. Y ca. 100% based on startg. m. consumed. F. e., also with phenyldimethyl-silane, s. Y. Nagai, K. Yamazaki, and I. Shiojima, Bull. Ghem. Soc. Japan 2210 (1967) also partial dehydrohalogenation by addition of FeGlg s. E. T. Ghukovskaya, N. A. Kuz mina, and R. K. Freidlina, Dokl. Akad. Nauk SSSR 175, 1301 (1967) G. A. 68, 59024 with trichlorosilane/tri-n-butylamine s. R. A. Benkeser and W. E. Smith, Am. Soc. 90, 5307 (1968). 

The poly(methyl methacrylate)s prepared in this experiment, as well as polymers formed in model reactions with silanes that contain bulky substituents (such as phenyldimethyl and diphenylmethyl groups), have predominantly syndiotactic structures identical to polymers prepared by the conventional group-transfer process. This result supports a two-step dissociative mechanism for a group-transfer process, because steric hindrance from bulky silyl groups should increase the proportion of isotactic triads in the hypothetical associative concerted propagation step. 

Phenyl-2,3-dimethylpyrazole-5-one 1-Phenyl-2,3-dimethyl-5-pyrazolone. See Antipyrine Phenyidimethylsilane CAS 766-77-8 EINECS/ELINCS 212-170-5 Synonyms Dimethylphenylsilane Silane, dimethylphenyl- Silane, phenyldimethyl-Empirical C8Hi2Si... 

AIGI3 added at -50° with stirring and exclusion of moisture to phenyldimethyl-(chloromethyl) silane, the temp, raised slowly to 35° when a vigorous reaction starts, and refluxed 2.5 hrs. after the reaction has subsided benzylchloro-dimethylsilane. Y 94%. F. e. s. R. W. Bott, G. Eaborn, and B. M. Rushton, J. Organometal. Chem. 3, 455 (1965). 

Hindered chlorosilanes (f-butyldimethyl, phenyldimethyl, tri-f-propyl) do not react. Moderate success (yields ca. 30-40%) was obtained in the synthesis of amino-silanes (Eq. 48), but this reaction accommodates hindered silyl (e.g., triphenyl)... 

Alternate Names [(chloromethyl)dimethylsilyl]benzene chlo-romethylphenyldimethylsilane dimethylphenylsilylmethyl chloride phenyldimethyl(chloromethyl)silane. 

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