The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: (S)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about A Bis-Steroidal Phosphine as New Chiral Hydrogenation Ligand, the main research direction is asym hydrogenation bissteroidal phosphine ligand preparation; stereoselective reduction ligand bissteroidal phosphine preparation.Synthetic Route of C5H10O3.
The new atropisomeric bissteroidal ligands R- and S-I are synthesized in 4 steps from the steroid precursor equilenin. The diastereomeric ligands are separable by column chromatog. and exhibit mirror image CD spectra. Likewise, they induce in the chiral reduction of acetophenone to enantiomeric 1-phenylethanols. The synthesis of the phosphine ligands R- and S-I is accomplished by a Ni-mediated cross coupling of the corresponding triflates with Ph2PH. The application of this new bissteroidal phosphine in the hydrogenation of Me acetoacetate, phenylcinnamic acid, and tiglic acid show that the in situ prepared chiral catalyst RuCl2(ligand)(DMF)2 is more active in terms of enantiomeric excess and/or conversion than the corresponding BINAP-derived catalyst.
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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics