Application of 53562-86-0. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (S)-Methyl 3-hydroxybutanoate, is researched, Molecular C5H10O3, CAS is 53562-86-0, about Highly Enantioselective Hydrogenation of β-Keto Esters under Mild Conditions. Author is Burk, Mark J.; Harper, T. Gregory P.; Kalberg, Christopher S..
New bis(phospholane)-Ru catalysts have been developed and shown to allow the highly enantioselective hydrogenation of β-keto esters under mild conditions. In particular, the catalyst derived from i-Pr-BPE-RuBr2 [i-Pr-BPE = 1,2-bis(trans-2,5-diisopropylphospholano)ethane] performs efficiently under 60 psig hydrogen and provides a variety of β-hydroxy esters with enantioselectivities in the range 98-99% ee. Enantiomerically pure β-hydroxy esters are key intermediates in the synthesis of chiral phospholane ligands. On this basis, rare examples of “”asym. ligand breeder”” processes have been developed for the self-generative synthesis of the i-Pr-BPE and Cy-BPE ligands.
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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics