Introduction of an alkyl group into the sugar portion of uracilnucleosides by the use of Gilman reagents.
作者:Hiroyuki HAYAKAWA、Hiroshi ASHIZAWA、Hiromichi TANAKA、Tadashi MIYASAKA
DOI:10.1248/cpb.38.355
日期:——
Substitution of a p-toluenesulfonyloxy group in the sugar portion of uracilnucleosides by an alkyl group was investigated by using Gilman reagents (R2CuLi). In the cases of 5'-O-tosyl derivatives of 2', 3'-O-isopropylideneuridine, moderate vields of 5'-alkylated products were obtained. In contrast to this, the reactions of the corresponding 2'-deoxyuridine derivatives gave higher yields of products. A similar substitution reaction at the 3'-position of 2'-deoxyuridine derivatives was also examined.
用Gilman试剂(R2CuLi)研究了尿嘧啶核苷糖部分的p-甲苯磺酰氧基被烷基取代的反应。对于2',3'-O-异亚丙基尿苷的5'-O-甲苯磺酸衍生物,得到了中等收率的5'-烷基化产物。与此相反,相应的2'-脱氧尿苷衍生物的反应则得到了更高收率的产物。还考察了在2'-脱氧尿苷衍生物的3'位进行类似取代反应的情况。