Biocatalytic syntheses of chiral non-racemic 2-hydroxyalkanephosphonates
摘要:
A series of 2-oxoalkanephosphonates 2 were screened for reduction with Geotrichum candidum. Only diethyl 2-oxopropanephosphonate 2a underwent asymmetric reduction to give (+)-(R)-diethyl 2-hydroxypropanephosphonate 3a with 98% e.e. In turn, a series of racemic 2-hydroxyalkanephosphonates 3 were acetylated under kinetic resolution conditions in the presence of various lipases to give the corresponding 2-acetoxyalkanephosphonates 4 and recovered alcohols 3 in good yields and with e.e. up to 93%. (C) 2002 Elsevier Science Ltd. All rights reserved.
A NEW SYNTHETIC ROUTE OF β-HYDROXYALKYLPHOSPHONATES FROM β,γ-EPOXYALKYLPHOSPHONATES
作者:Toshio Nagase、Takayuki Kawashima、Naoki Inamoto
DOI:10.1246/cl.1984.1997
日期:1984.11.5
β-Hydroxyalkylphosphonates were synthesized from β,γ -epoxyalkylphosphonates and RMgX/ cat. CuI reagents, which is a new synthetic route for the various types of α- and/or γ-substituted β-hydroxyalkylphosphonates.
A BF3.OEt2 catalyzed, regiospecific nucleophilic ring opening reaction of epoxides by dialkyl phosphite and methanephosphonate esters is described. The reaction proceeds in good to excellent yields to give the title compounds and is compatible with a variety of other functional groups.
Synthesis of branched 9-[2-(2-phosphonoethoxy)ethyl]purines as a new class of acyclic nucleoside phosphonates which inhibit Plasmodium falciparum hypoxanthine–guanine–xanthine phosphoribosyltransferase
作者:Dana Hocková、Antonín Holý、Milena Masojídková、Dianne T. Keough、John de Jersey、Luke W. Guddat
DOI:10.1016/j.bmc.2009.07.044
日期:2009.9.1
the salvage enzyme, hypoxanthine–guanine–xanthine phosphoribosyltransferase (HGXPRT), for the synthesis of the 6-oxopurine nucleoside monophosphates. Specific acyclicnucleosidephosphonates (ANPs) inhibit PfHGXPRT and possess anti-plasmodial activity. Two series of novel branched ANPs derived from 9-[2-(2-phosphonoethoxy)ethyl]purines were synthesized to investigate their inhibition of PfHGXPRT and