摘要:
5-trifluoromethyl-2,4-bis(trimethylsilyloxy)pyrimidi ne is reacted with a 2-deoxy-α-D-erythro-pentofuranosyl chloride derivative reacted in the absence or presence of a small amount of solvent to give a β-form of 1-(2'-deoxy-β-D-erythro-pentofuranosyl)-5-trifluoromethyl uracil derivative with a high selectivity.
摘要:
A process for producing a glycide derivative represented by general formula (I), which comprises reacting an aryl or heteroaryl alcohol represented by A-OH with glycidyl tosylate in the presence of a cesium base. In formula (I) A represents aryl or heteroaryl. This process enables an aryl glycidyl ether derivative, an important intermediate for the production of medicines, to be produced readily without fail and can provide a compound with a high optical purity particularly when optically active glycidyl tosylate is used.
摘要:
5-trifluoromethyl-2,4-bis(trimethylsilyloxy)pyrimidi ne is reacted with a 2-deoxy- alpha -D-erythro-pentofuranosyl chloride derivative reacted in the absence or presence of a small amount of solvent to give a beta -form of 1-(2'-deoxy- beta -D-erythro-pentofuranosyl)-5-trifluoromethyl uracil derivative with a high selectivity.
摘要:
A desired isomer is selectively prepared by phosphorolyzing and isomerizing an anomer mixture of a 1-phosphorylated saccharide derivative while crystallizing one of the isomers to displace the equilibrium. Furthermore, using the action of a nucleoside phosphorylase, a nucleoside is prepared from the 1-phosphorylated saccharide derivative obtained and a base with improved stereoselectivity and a higher yield. This process is an anomer-selective process for preparing a 1-phosphorylated saccharide derivative and a nucleoside.
摘要:
A mixture of 1-phosphorylated sugar derivative anomers is phosphorolyzed and isomerized to thereby crystallize one of the anomers. Thus, the equilibrium is shifted and a desired isomer alone is selectively produced. From the 1-phosphorylated sugar derivative thus obtained and a base, a nucleoside is produced at a high stereoselectivity and a high yield under the action of a nucleoside phosphorylase. Thus, a process for anomer-selectively producing a 1-phosphorylated sugar derivative and a process for producing a nucleoside are provided.
摘要:
A novel compound represented by general formula (1) or a pharmacologically acceptable salt thereof, being useful as anticancer, antiviral and antibacterial agents.