Synthesis of temozolomide esters as potent anticancer pro-drugs for topical and transdermal applications in treatments of cancers
申请人:Wang Yongfeng
公开号:US20060047117A1
公开(公告)日:2006-03-02
This invention relates to the use of temozolomide esters (4-dihydro-3-methyl-4-oxoimidazo[5,1-d]-1,2,3,5-tetrazine-8-carboxylate esters) Formula 1 as potent anticancer pro-drugs for treatment of cancers by topical and transdermal applications, and to a novel process for synthesis of temozolomide esters by a direct esterification of temozolomide acid (3,4-dihydro-3-methyl-4-oxoimidazo[5,1-d]-1,2,3,5-tetrazine-8-carboxylic acid) with a halogeno-aliphatic compound in presence of a base, or with an alcohol in presence of a dehydrate agent.
该发明涉及使用替莫唑胺酯(4-二氢-3-甲基-4-氧基咪唑[5,1-d]-1,2,3,5-四唑-8-羧酸酯)化合物(式1)作为有效的抗癌前药,用于局部和经皮应用治疗癌症,并涉及一种新型合成替莫唑胺酯的方法,即通过直接酯化替莫唑胺酸(3,4-二氢-3-甲基-4-氧基咪唑[5,1-d]-1,2,3,5-四唑-8-羧酸)与卤代脂肪化合物在碱的存在下,或与醇在脱水剂存在下进行酯化。