Kinetic resolution of hydroxyalkanephosphonates catalyzed by Candida antarctica lipase B in organic media
作者:Yonghui Zhang、Chengye Yuan、Zuyi Li
DOI:10.1016/s0040-4020(02)00229-6
日期:2002.4
A series of hydroxyalkanephosphonates were studied as substrates for CALB catalyzed acetylation with emphasis on enantioselectivity and chemical structure of substrates. Some hydroxyalkanephosphonates could be resolved successfully to give both (R)- and (S)-isomers with high enantiomeric excess.
An Efficient Route to Chiral α- and β-Hydroxyalkanephosphonates
作者:Oscar Pàmies、Jan-E. Bäckvall
DOI:10.1021/jo026888m
日期:2003.6.1
Enzymatic kinetic resolution of alpha- and beta-hydroxyphosphonates in combination with ruthenium-catalyzed alcohol isomerization led to a successful dynamic kinetic resolution. A variety of racemic hydroxyphosphonates were efficiently transformed to the corresponding enantiomerically pure acetates (ee up to 99% and yield up to 87%).
Nonenzymatic kinetic resolution of racemic β-hydroxyalkanephosphonates with a chiral copper catalyst
Kinetic resolution of beta-hydroxyalkanephosphonates was efficiently performed by 2-fluorobenzoylation in the presence of copper(II) triflate and (R,R)-Ph-BOX as a catalyst with good s value of up to 21 (C) 2010 Elsevier Ltd. All rights reserved.
Enantioselective hydrogenation of β-keto esters catalyzed by P-chiral bis(dialkylphosphino)ethanes-Ru(II)
Asymmetric hydrogenation of keto esters using a BisP*-RuBr2, catalyst is reported. High enantioselectivities up to 98% were achieved in the hydrogenation of beta-keto esters. (C) 1999 Elsevier Science Ltd. All rights reserved.
Enantioselective Hydrogenation of β-Ketophosphonates with Chiral Ru(II) Catalysts
Highly effective asymmetrichydrogenation of β-ketophosphonates in the presence of Ru–(S)-SunPhos as catalyst was realized; good to excellent enantioselectivities (up to 99.9% ee) and excellent diastereoselectivities (96:4) were obtained.