An article Asymmetric hydrogenation of an a-unsaturated carboxylic acid catalyzed by intact chiral transition metal carbonyl clusters – diastereomeric control of enantioselectivity WOS:000526110700040 published article about RUTHENIUM COMPLEXES; HETEROGENEOUS CATALYSIS; TRIOSMIUM CLUSTERS; REACTIVITY; MECHANISM; CRYSTAL; LIGANDS; SULFIDO; SPECTROSCOPY; CONVERSION in [Abdel-Magied, Ahmed F.; Theibich, Yusuf; Singh, Amrendra K.; Rahaman, Ahibur; Raha, Arun K.; Nordlander, Ebbe] Lund Univ, Dept Chem, Chem Phys, Box 124, SE-22100 Lund, Sweden; [Doverbratt, Isa] Lund Univ, Ctr Anal & Synth, Dept Chem, Box 124, SE-22100 Lund, Sweden; [Haukka, Matti] Univ Jyvaskyla, Dept Chem, Box 35, FI-40014 Jyvaskyla, Finland; [Richmond, Michael G.] Univ North Texas, Dept Chem, Denton, TX 76203 USA in 2020, Cited 48. Name: (E)-2-Methylbut-2-enoic acid. The Name is (E)-2-Methylbut-2-enoic acid. Through research, I have a further understanding and discovery of 80-59-1
Twenty clusters of the general formula [(mu-H)(2)Ru-3(mu(3)-S)(CO)(7)(mu-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 Ru-3 clusters. A catalytic mechanism involving an active Ru-3 catalyst generated by CO loss from [(mu-H)(2)Ru-3(mu(3)-S) (CO)(7)(mu-P-P*)] has been investigated by DFT calculations.
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Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles