Asymmetric hydrogenation of an α-unsaturated carboxylic acid catalyzed by intact chiral transition metal carbonyl clusters – diastereomeric control of enantioselectivity.

Autor: Abdel-Magied, Ahmed F., Theibich, Yusuf, Singh, Amrendra K., Rahaman, Ahibur, Doverbratt, Isa, Raha, Arun K., Haukka, Matti, Richmond, Michael G., Nordlander, Ebbe
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Zdroj: Dalton Transactions: An International Journal of Inorganic Chemistry; 4/14/2020, Vol. 49 Issue 14, p4244-4256, 13p
Abstrakt: Twenty clusters of the general formula [(μ-H)2Ru33-S)(CO)7(μ-P–P*)] (P–P* = chiral diphosphine of the ferrocene-based Walphos or Josiphos families) have been synthesised and characterised. The clusters have been tested as catalysts for asymmetric hydrogenation of tiglic acid [trans-2-methyl-2-butenoic acid]. The observed enantioselectivities and conversion rates strongly support catalysis by intact Ru3 clusters. A catalytic mechanism involving an active Ru3 catalyst generated by CO loss from [(μ-H)2Ru33-S)(CO)7(μ-P–P*)] has been investigated by DFT calculations. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index