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.
Enzymes in Organic Chemistry, 11:[1] Hydrolase-Catalyzed Resolution ofα- andβ-Hydroxyphosphonates and Synthesis of Chiral, Non-Racemicβ-Aminophosphonic Acids
作者:A. Woschek、Wolfgang Lindner、F. Hammerschmidt
DOI:10.1002/adsc.200303135
日期:2003.12
enantioselective acylation of racemic diisopropyl α- and β-hydroxyphosphonates by hydrolases in t-butyl methyl ether with isopropenyl acetate as acyl donor is limited by the narrow substrate specificity of the enzymes. High enantiomeric excesses (up to 99%) were obtained for the acetates of (S)-diisopropyl 1-hydroxy-(2-thienyl)methyl-, 1-hydroxyethyl- and 1-hydroxyhexylphosphonate and (R)-diisopropyl 2-hydroxypropylphosphonate
Utilization of 1,3-Dioxolanes in the Synthesis of α-branched Alkyl and Aryl 9-[2-(Phosphonomethoxy)Ethyl]Purines and Study of the Influence of α-branched Substitution for Potential Biological Activity
Attachment of purine bases to dialkyl [(2-hydroxyethoxy)methyl]phosphonates was performed by Mitsunobu reaction. Final α-branched 9-[2-(phosphonomethoxy)ethyl]purines were tested for antiviral, cytostatic and antiparasitic activity, the latter one determined as inhibitory activity towards Plasmodium falciparum enzyme hypoxanthine-guanine-xanthine phosphoribosyltransfesase. In most cases biological activity
Easy PC: α‐Hydroxy phosphonates were synthesized by copper/tert‐butyl hydroperoxide (TBHP)‐catalyzed oxidative addition reactions of H‐phosphonates with alcohols or ethers. Diverse α‐hydroxy phosphonates were obtained from substituted benzyl alcohols or alkyl alcohols and alkyl ethers in moderate to good yields.
An unexpected ruthenium complex and its unique behavior as catalyst in dynamic kinetic resolution of secondary alcohols
作者:Qihui Chen、Chengye Yuan
DOI:10.1039/b811627j
日期:——
A ruthenium complex was accidentally synthesized and its unique catalytic behavior in dynamic kinetic resolution of various types of secondary alcohols, particularly for those bearing additional functional groups, is described.