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Isosteric phosphonate analogs of ET-16-OMe. Synthesis and biological evaluation of the enantiomers of 2'-(trimethylammonio)ethyl 4-(hexadecyloxy)-3-methoxybutanephosphonate and 2'-(trimethylammonio)ethyl 4-(hexadecylthio)-3-methoxybutanephosphonate.

Abstract：

:The enantiomers of two isosteric phosphonate analogs of the ether-linked antitumor agent 1-O-octadecyl-2-O-methyl-sn-glycero-3-phosphocholine (ET-18-OMe) were synthesized and evaluated for their cytotoxicity against various mouse leukemic cell lines in vitro and in vivo. The key step in the synthesis of the alkyloxy and alkylthio analogs (1 and 2, respectively) is the opening of an epoxide [hexadecyl 2-oxiranylmethyl ether (4) or hexadecyl 2-oxiranylmethyl thioether (8)] by LiCH2P(O)(OMe)2 using BF3.Et2O in tetrahydrofuran at low temperature. The cytotoxic activities of the hexadecyloxy and hexadecylthio phosphonate analogs of ET-18-OMe (1 and 2) against the murine leukemias WEHI-3B,L1210, and P388 were similar, indicating that substitution of a sulfur atom for oxygen in the long-chain ether does not result in a significant difference in cytotoxicity. The IC50 values of 1 and 2 were in the range of 1-5 microM. Alkyloxy phosphonate 1 was highly effective in inhibiting the growth of WEHI-3B and P388 tumors implanted in BALB/C mice. The alkyloxy and alkylthio phosphonates 1 and 2 prolonged the survival of CD1 mice bearing L1210 tumors. The antitumor activities of the phosphonate analogs of ET-18-OMe in these in vitro and in vivo studies were independent of chirality, consistent with previous studies with the enantiomers of 1-O-hexadecyl-2-O-methyl-sn-glycero-3-phosphocholine.

journal_name

J Med Chem

journal_title

Journal of medicinal chemistry

authors

Bittman R,Byun HS,Mercier B,Salari H

doi

10.1021/jm00029a016

subject

Has Abstract

pub_date

1994-02-04 00:00:00

pages

425-30

issue

3

eissn

0022-2623

issn

1520-4804

journal_volume

37

pub_type

杂志文章

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