[EN] PROCESS FOR THE ISOLATION OF GANCICLOVIR INTERMEDIATE<br/>[FR] PROCÉDÉ D'ISOLATION D'UN INTERMÉDIAIRE DE GANCICLOVIR
申请人:HETERO RESEARCH FOUNDATION
公开号:WO2011114336A1
公开(公告)日:2011-09-22
The present invention relates to process for isolation of ganciclovir intermediate. The present invention also provides a novel crystalline forms of ganciclovir, processes for their preparation and pharmaceutical composition comprising them. Thus, for example, to a mixture containing N-7 and N-9 isomer was added acetic acid and acetonitrile at 25 to 300C to obtain a mass having a pH of 4.0 to 5.0, the reaction mass was cooled to -5 to -100C and stirred for 3 hours at -5 to -100C, filtered, washed with chilled acetonitrile and dried at 600C for 4 hours to give N2-acetyl-9-(l,3-diacetoxy-2- propoxymethyl) guanine.
9-(1,3-dihydroxy-2-propoxymethyl)guanine and 9-(2,3-dihydroxy-1-propoxymethyl)guanine have been found to have potent anti-viral activity against herpes viruses. These compounds, their acyl derivatives, their phosphate derivatives and their pharmaceutically acceptable salts, pharmaceutical formulations containing these compounds, the treatment of viral infections with these compounds, methods of preparing these compounds, and novel intermediates useful in their preparation are all disclosed.
The compounds may be prepared by reaction of the appropriate acetoxymethyl ether with diacetylguanine, followed by deprotection. The acetoxymethyl ethers may be obtained by reaction of glycerol formal with acetic anhydride in the presence of a catalyst.
Anti-viral compounds, their preparation and anti-viral compositions
申请人:Merck & Co., Inc.
公开号:EP0165164A1
公开(公告)日:1985-12-18
9-(1, 3-Dihydroxy-2-propoxymethyl) quanine and 9-(2, 3-dihydroxy-1-propoxymethyl) guanine have been found to have potent anti-viral activity against herpes viruses. These compounds, their acyl derivatieves, their phosphate derivatives and their pharmaceutically acceptable salts, phar-- maceutical formulations containing these compounds, the treatment of DNA viral or herpes viral infections with these compounds, methods of preparing these compounds, and novel intermediates useful in their preparation are all disclosed.
The compounds may be prepared by reaction of the appropriate acetoxymethyl ether with diacetyl-quanine, followed by deprotection. The acetoxymethyl ethers may be obtained by reaction of glycerol formal with acetic anhydride in the presence of a catalyst.