Heterocyclic derivatives useful as radiosensitizing agents and antiviral
申请人:Pola Chemical Industries Inc.
公开号:US05064849A1
公开(公告)日:1991-11-12
A novel heterocyclic derivative of formula (I): ##STR1## wherein R.sub.1 represents ##STR2## and R.sub.2 represents hydrogen or acyl. When R.sub.2 is acyl, the derivative can be prepared, for example, by the following process: ##STR3## wherein R.sub.4 is acyl and R.sub.1 is ##STR4## The derivative is less toxic and has radiosensitizing activity and antiviral activity even at a low concentration. Radiosensitizing agents and antiviral agents containing the derivative as active component are also disclosed.
It is an object to provide a method for producing a 2-nitroimidazole derivative having an acyclic sugar chain in a side chain, which is suitable for production of a derivative having a radioisotope.
A method for producing 1-(1-benzoyloxymethyl-2-hydroxyethyl)oxymethyl-2-nitroimidazole, characterized by reacting glycerin with a benzoylating agent to obtain 1-O-benzoylglycerin, reacting 1-O-benzoylglycerin with dimethoxymethane in the presence of a dehydrating agent to obtain 4-benzoyloxymethyl-1,3-dioxolane, and then reacting this product with 2-nitroimidazole or 2-nitro-1-trialkylsilylimidazole in the presence of a Lewis acid.
Heterocyclic derivatives, their preparation and radiosensitizing agents and antiviral agents comprising same as their active component
申请人:POLA CHEMICAL INDUSTRIES INC., JAPAN
公开号:EP0312858A1
公开(公告)日:1989-04-26
A novel heterocyclic derivative of formula (I):
wherein R1 represents
and R2 represents hydrogen or acyl. When R2 is acyl, the derivative can be prepared, for example, by the following process:
wherein R4 is acyl and R1 is
The derivative is less toxic and has radiosensitizing activity and antiviral activity even at a low concentration.
Radiosensitizing agents and antiviral agents containing the derivative as active component are also disclosed.
Fluorine-18 labeled 1-[2-fluoro-1-(hydroxymethyl) ethoxy]-mehyl-2-nitroimidazole ([F-18]FENI), a novel, potential radiotracer for imaging hypoxic tissue by PET, was synthesized. The [F-18]FENI was prepared by nucleophilic F-18-fluorination of the precursor, 1-[2-(toluene-4-sulfoxy)-1-(acetoxymethyl)ethoxy]methyl-2-nitroimidazole, followed by deprotection and HPLC purification. Radiochemically pure [F-18]FENI was obtained in overall yields of 3-11% (EOR) with specific activity of >26 GBq/mu mol (EOS) within 90 min.