Phosphoramidate and phosphate prodrugs of (−)-β-d-(2R,4R)-dioxolane-thymine: Synthesis, anti-HIV activity and stability studies
摘要:
A series of phosphoramidate and phosphate prodrugs of DOT were synthesized via dichlorophosphate or H-phosphonate chemistry and evaluated for their anti-HIV activity against LAI M 184V mutants in PBM cells as well as for their cytotoxicity. The antiviral and cytotoxic profiles of the prodrugs were compared with that of the parent compound (DOT), and it was found that four aryl phosphoramidates 5, 18, 20, and 26 showed a significant enhancement (8- to 12-fold) in anti-HIV activity without cytotoxicity. Chemical stability of these prodrugs was evaluated in phosphate buffer at pH values of biological relevance (i.e., pH 2.0 and 7.4). Enzymatic hydrolysis was also studied in esterase or lipase in buffer solution. Chemical stability studies indicate that the phosphoramidates have good chemical stability at pH 2.0 and at pH 7.4 phosphate buffer. Phosphoramidate prodrugs were hydrolyzed in vitro by esterase or lipase and found to be better substrates for lipases than for esterases. 1,3-Diol cyclic phosphates showed potent anti-HIV activity without increasing the cytotoxicity compared with that of DOT and have good chemical and enzymatic stability. Long-chain lipid phosphates, although showed potent anti-HIV activity, exhibited increased cytotoxicity. (c) 2005 Elsevier Ltd. All rights reserved.
Intracellular delivery of bioactive AZT nucleotides by aryl phosphate derivatives of AZT
摘要:
Novel aryl phosphate derivatives of the anti-HIV nucleoside analogue AZT have been prepared by phosphorochloridate chemistry. These materials were designed to act as membrane-soluble prodrugs of the bioactive free nucleotides. In vitro evaluation revealed the compounds to have a pronounced, selective anti-HIV activity in CEM cells; the magnitude of the biological effect varied considerably depending on the nature of the phosphate blocking group. Moreover, several of the compounds retain marked antiviral activity iri TK- (thymidine kinase-deficient) mutant CEM cells in which AZT was virtually inactive. These data strongly support the hypothesis that the AZT phosphate derivatives exert their biological effects via intracellular release of AZT nucleotide forms and suggest that the potential of nucleoside drugs in antiviral chemotherapy may be enhanced by suitable nucleotide delivery strategies.
METHOD FOR PRODUCING AN AMINO GROUP-CONTAINING PHOSPHATE COMPOUND, AND A FLAME-RETARDANT RESIN AND FLAME-RETARDANT RESIN COMPOSITION
申请人:Kamata Hirotoshi
公开号:US20100298506A1
公开(公告)日:2010-11-25
The present invention relates to a method for producing an amino group-containing phosphate compound, by which the compound can be easily synthesized through a one-step reaction. The method for producing an amino group-containing phosphate compound comprises reacting an aminophenol compound represented by the general formula (1)
with a dichlorophosphoric acid compound represented by the general formula (2):
(where X
1
, X
2
, X
3
, X
4
and X
5
each represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms) in the presence of an inorganic basic compound in an aprotic organic solvent, to obtain a amino group-containing phosphate compound represented by the following general formula (3)
where X
1
, X
2
, X
3
, X
4
and X
5
are defined in the same way as in the general formula (2).
PROCESS FOR PRODUCTION OF AMINATED PHOSPHORIC ACID ESTER COMPOUND, FLAME-RETARDANT RESIN, AND FLAME-RETARDANT RESIN COMPOSITION
申请人:SHOWA HIGHPOLYMER CO., LTD.
公开号:EP2036911A1
公开(公告)日:2009-03-18
The present invention relates to a method for producing an amino group-containing phosphate compound, by which the compound can be easily synthesized through a one-step reaction. The method for producing an amino group-containing phosphate compound comprises reacting an aminophenol compound represented by the general formula (1)
with a dichlorophosphoric acid compound represented by the general formula (2):
(where X1, X2, X3, X4 and X5 each represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms) in the presence of an inorganic basic compound in an aprotic organic solvent, to obtain a amino group-containing phosphate compound represented by the following general formula (3)
where X1, X2, X3, X4 and X5 are defined in the same way as in the general formula (2).
Phosphoramidate and phosphate prodrugs of (−)-β-d-(2R,4R)-dioxolane-thymine: Synthesis, anti-HIV activity and stability studies
作者:Yuzeng Liang、Janarthanan Narayanasamy、Raymond F. Schinazi、Chung K. Chu
DOI:10.1016/j.bmc.2005.11.008
日期:2006.4
A series of phosphoramidate and phosphate prodrugs of DOT were synthesized via dichlorophosphate or H-phosphonate chemistry and evaluated for their anti-HIV activity against LAI M 184V mutants in PBM cells as well as for their cytotoxicity. The antiviral and cytotoxic profiles of the prodrugs were compared with that of the parent compound (DOT), and it was found that four aryl phosphoramidates 5, 18, 20, and 26 showed a significant enhancement (8- to 12-fold) in anti-HIV activity without cytotoxicity. Chemical stability of these prodrugs was evaluated in phosphate buffer at pH values of biological relevance (i.e., pH 2.0 and 7.4). Enzymatic hydrolysis was also studied in esterase or lipase in buffer solution. Chemical stability studies indicate that the phosphoramidates have good chemical stability at pH 2.0 and at pH 7.4 phosphate buffer. Phosphoramidate prodrugs were hydrolyzed in vitro by esterase or lipase and found to be better substrates for lipases than for esterases. 1,3-Diol cyclic phosphates showed potent anti-HIV activity without increasing the cytotoxicity compared with that of DOT and have good chemical and enzymatic stability. Long-chain lipid phosphates, although showed potent anti-HIV activity, exhibited increased cytotoxicity. (c) 2005 Elsevier Ltd. All rights reserved.
Intracellular delivery of bioactive AZT nucleotides by aryl phosphate derivatives of AZT
作者:Christopher McGuigan、Ranjith N. Pathirana、Jan Balzarini、Erik De Clercq
DOI:10.1021/jm00060a013
日期:1993.4
Novel aryl phosphate derivatives of the anti-HIV nucleoside analogue AZT have been prepared by phosphorochloridate chemistry. These materials were designed to act as membrane-soluble prodrugs of the bioactive free nucleotides. In vitro evaluation revealed the compounds to have a pronounced, selective anti-HIV activity in CEM cells; the magnitude of the biological effect varied considerably depending on the nature of the phosphate blocking group. Moreover, several of the compounds retain marked antiviral activity iri TK- (thymidine kinase-deficient) mutant CEM cells in which AZT was virtually inactive. These data strongly support the hypothesis that the AZT phosphate derivatives exert their biological effects via intracellular release of AZT nucleotide forms and suggest that the potential of nucleoside drugs in antiviral chemotherapy may be enhanced by suitable nucleotide delivery strategies.