The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Bis(norbornadiene)rhodium (I) tetrafluoroborate(SMILESS: [F-][B+3]([F-])([F-])[F-].C12=C3[Rh+]14567(C8=C5C9C6=C7C8C9)C%10=C4C2CC3%10,cas:36620-11-8) is researched.COA of Formula: C14H8BF4Rh. The article 《Efficient Access to Chiral β-Borylated Carboxylic Esters via Rh-Catalyzed Hydrogenation》 in relation to this compound, is published in Advanced Synthesis & Catalysis. Let’s take a look at the latest research on this compound (cas:36620-11-8).
Rh/bisphosphine-thiourea ligand (ZhaoPhos)-catalyzed asym. hydrogenation of (Z)-β-substituted-β-boryl-α,β-unsaturated esters was successfully developed, furnishing a variety of chiral β-borylated carboxylic esters with high yields and excellent enantioselectivities (up to 99% yield and >99% ee). The gram-scale asym. hydrogenation was performed efficiently in the presence of only 0.05 mol% (S/C = 2000) catalyst loading with full conversion, 99% yield and 99% ee. Moreover, the hydrogenation product was easily converted to other versatile synthetic intermediates, such as Me (S)-3-hydroxy-3-phenylpropanoate and Me (S)-3-(furan-2-yl)-3-phenylpropanoate.
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Reference:
Quinuclidine – Wikipedia,
Quinuclidine | C7H13N | ChemSpider