The stereodifferentiating activity of Ziegler-Natta type Ti(IV) catalysts carrying the chiral ligands menthyl or neomenthyl cyclopentadienyl has been investigated in the asymmetric homogeneous catalytic reduction of a prochiral olefin such as 2-phenyl-1-butene, which is hydrogenated with acceptable optical yields to (R)-(-) or (S)-(+)-2-phenyl-1-butane, respectively. The effect on the optical yields of the reaction temperature, of the nature of the chiral cocatalyst or of achiral cocatalysts of different bulk has also been studied.
Chiral cyclopentadienyl[s] as ligands in homogeneous asymmetric catalysis. Part 1. Asymmetric hydrogenation of simple olefins by titanium(IV) complexes / E. Cesarotti, R. Vitiello, R. Ugo. - In: JOURNAL OF MOLECULAR CATALYSIS. - ISSN 0304-5102. - 12:1(1981), pp. 63-69. [10.1016/0304-5102(81)80019-3]
Chiral cyclopentadienyl[s] as ligands in homogeneous asymmetric catalysis. Part 1. Asymmetric hydrogenation of simple olefins by titanium(IV) complexes
E. CesarottiPrimo
;
1981
Abstract
The stereodifferentiating activity of Ziegler-Natta type Ti(IV) catalysts carrying the chiral ligands menthyl or neomenthyl cyclopentadienyl has been investigated in the asymmetric homogeneous catalytic reduction of a prochiral olefin such as 2-phenyl-1-butene, which is hydrogenated with acceptable optical yields to (R)-(-) or (S)-(+)-2-phenyl-1-butane, respectively. The effect on the optical yields of the reaction temperature, of the nature of the chiral cocatalyst or of achiral cocatalysts of different bulk has also been studied.
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