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Chemical Synthesis of Acyclic Nucleoside Phosphonate Analogs Linked with Cyclic Systems Between the Phosphonate and the Base Moieties

Author(s):

Guang Huan Shen and Joon Hee Hong*   Pages 1 - 30 ( 30 )

Abstract:


The syntheses of acyclic nucleoside phosphonate (ANP) analogs linked with cyclic systems are described in the present review. The purpose of the review is to report the methodology of ANP analogs and to give an idea on the synthesis of a therapeutic structural feature of such analogs. The cyclopropane systems were mainly prepared by diazomethane cyclopropanation catalyzed by Pd(OAc)2, intramolecular alkylation, Kulinkovich cyclopropanation, and use of difluorocyclopropane, and so on. The preparation of methylenecyclopropane system was made by diazoacetate cyclopropanation catalyzed by Rhodium followed by addition-elimination reactions. For the preparation of a variety of tethered 1,2,3-triazole systems, 1,3-dipolar cycloaddition between azidealkylphosphonates and propargylated nucleobases was mainly applied. The formation of various phosphonate moieties was achieved via phosphonylation of alkoxide, cross-coupling between BrZnCF2P(O)(OEt)2 with iodoalkens catalyzed by CuBr, Michaelis-Arbuzov reaction with phosphite, and Rh(II)-catalyzed O-H insertion, and so forth.

Keywords:

acyclic nucleoside phosphonate (ANP), purine nucleoside phosphorylase (PNP), antiviral agents, enzyme inhibitors, phosphonylation, 1-3-diploar cycloaddition

Affiliation:

Heilongjiang Provincial Key Laboratory of Drug Prevention and Treatment for Senile Diseases, College of Pharmacy, Harbin University of Commerce,Harbin 150076, P.R.China; College of Pharmacy, Chosun University, Kwangju 501-759, Heilongjiang Provincial Key Laboratory of Drug Prevention and Treatment for Senile Diseases, College of Pharmacy, Harbin University of Commerce,Harbin 150076, P.R.China; College of Pharmacy, Chosun University, Kwangju 501-759



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