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Diethylzinc-Titanium chloride

Boor (65) showed that the specificity and activity of a propylene catalyst depended on both catalyst components. The addition of tri-alkylamines to titanium trichloride catalysts made with diethylzinc, ethylzinc chloride, or diethylcadmium, increased the specificity of the catalyst. There was also a simultaneous decrease in activity. Boor ascribed this phenomena to the amine deactivating catalysts which cause the non-stereospecific polymerization. The amine either destroyed the... [Pg.369]

Triphenylphosphine-Diethyl azodicar-boxylate, 332 Other substitutions Allyltrimethylsilane, 11 Benzylamine, 79 Bromodimethylborane, 47 Chlorotrimethylsilane-Lithium, 81 Crotyltrimethylsilane, 86 Diethylzinc-Titanium(IV) chloride, 21 Lithium bis(dimethylphenylsily 1)-cuprate, 161... [Pg.375]

Dichlorodiisopropoxytitanium(IV), 12 Dichlorodimethyltitanium, 216 Diethylzinc-Titanium(IV) chloride, 21 Diiodomethane-Zinc-Titanium(IV) chloride, 114... [Pg.415]

No reaction occurs when triethylaluminum, aluminum chloride, stannic chloride, titanium tetrachloride, diethylzinc or triethylboron are used in lieu of an organoaluminum halide or sesquihalide. [Pg.133]

CYCLOPROPANATION Copper-lsonitrile complexes. Cupric chloride. Diethylzinc-Bromoform-Oxygen. Palladium acetate. Titanium(IV) chloride-Lithium aluminum hydride. [Pg.779]

Enantioselective addition of (C2Hs)2Zn to ECHO. Of a variety of chiral N-sulfonylamino alcohols, 1 was found to be the most effective ligand for asymmetric addition of diethylzinc to aldehydes catalyzed by titanium(IV) isopropoxide in methylene chloride. Addition of calcium hydride or 4 A molecular sieves does not affect the enantioselectivity but can increase the yield. [Pg.181]

Significant counterion effects are observed in the enantioselectivity of addition of diethylzinc to benzaldehyde using a titanium/a-acetyl-(5 )-BINOL system. rran5-l,2-Diaminocyclohexane - a common motif used in asymmetric catalysis - exhibits a dihedral angle of ca 60° between the amino groups, whereas rranx-ll,12-diamino-9,10-dihydro-9,10-ethanoanthracene (124) is constrained to >110°. Further functionality and chirality has been incorporated by the formation of bis-sulfonamides of (124), using (S j-camphor sulfonyl chloride. The... [Pg.39]

See other pages where Diethylzinc-Titanium chloride is mentioned: [Pg.641]    [Pg.362]    [Pg.380]    [Pg.641]    [Pg.416]    [Pg.337]    [Pg.280]    [Pg.416]    [Pg.267]    [Pg.309]    [Pg.552]    [Pg.383]    [Pg.383]    [Pg.628]    [Pg.655]    [Pg.153]    [Pg.171]    [Pg.114]    [Pg.12]    [Pg.160]   
See also in sourсe #XX -- [ Pg.21 ]

See also in sourсe #XX -- [ Pg.21 ]



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Diethylzinc

Titanium chloride

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