Stereoselective Synthesis of 2‘-Amino-2‘,3‘-dideoxynucleosides by Nitrone 1,3-Dipolar Cycloaddition: A New Efficient Entry Toward d4T and Its 2-Methyl Analogue
作者:Ugo Chiacchio、Antonio Rescifina、Daniela Iannazzo、Giovanni Romeo
DOI:10.1021/jo972264i
日期:1999.1.1
2'-(dimethylamino)-2',3'-dideoxynucleosides is reported. The synthetic strategy relies on the 1,3-dipolar cycloaddition of C-alkoxycarbonyl nitrones to allyl acetate, followed by reductive ring opening to substituted lactones, DIBALH reduction to the corresponding 3-(dimethylamino)tetrahydro-2-furanols, and coupling with silylated thymine. The removal of the dimethylamino group by Cope elimination affords a new formal
据报道有效获得2'-(二甲基氨基)-2',3'-二脱氧核苷。合成策略依赖于将C-烷氧羰基硝酮与乙酸烯丙酯进行1,3-偶极环加成,然后将开环还原成取代的内酯,将DIBALH还原为相应的3-(二甲氨基)四氢-2-呋喃醇,然后与甲硅烷基化偶联胸腺嘧啶。通过Cope消除去除二甲基氨基基团提供了d4T和类似的不饱和2',3'-二脱氧核苷的新形式合成。