cas 17312-45-7, 3,4-dimethyldecane | Articles data

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The tantalum-catalyzed carbozincation of 1-alkenes with zinc dialkyls
The TaCl5-mediated reaction between monosubstituted alkenes and Et2Zn affords 3-(R-substituted)-n-butylzincs in high yield (up to 92%) and regioselectivity. Organozinc reagents bearing a longer alkyl chain (R = Prn, Bun, Amn, Hexn) react with 1-alkenes in the presence of TaCl5 as the catalyst to give two types of organozinc compound having iso-alkyl structure. The probable mechanism of the carbozincation reaction implies the formation of β-substituted and β,β'-disubstituted tantalacyclopentanes as the key intermediates. The thermodynamic probability of the mechanistic elementary stages for the ethylzincation of terminal alkenes has been estimated using DFT PBE/SBK method.
Sultanov, Rifkat M.,Samoilova, Elena V.,Popod'Ko, Natal'Ya R.,Sabirov, Denis Sh.,Dzhemilev, Usein M.
p. 23 - 29
(2015)
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Regioselective and Diastereoselective Alkyl-Alkene and Alkene-Alkene Coupling Promoted by Zirconocene and Hafnocene
The reaction of Cp2Zr(CH2CH2R1)2 with a monosubstituted terminal alkene (H2C=CHR2) can produce, in a highly regio- and diastereoselective manner, zirconacyclopentane derivatives; the trans-3,4-disubstituted derivatives may be formed to the extents of >98percent in cases where both R1 and R2 are alkyl, while the trans-2-aryl-4-alkyl derivatives may be formed to the extents of >98percent in the coupling between a monoalkyl-substituted olefin and styrene or its derivative.
Swanson, Douglas R.,Rousset, Christophe J.,Negishi, Ei-ichi,Takahashi, Tamotsu,Seki, Takashi,et al.
p. 3521 - 3523
(2007/10/02)