Synthesis and X-ray crystal structure of the first example of an anhydro-nucleoside with two oxygen bridges between the base and the sugar
作者:Serge David、G�rard de Sennyey、Claudine Pascard、Jean Guilhem
DOI:10.1039/c39810000780
日期:——
The isomerization with boron trifluoride–ether of 4-N-acetyl-1-(2,3-O-isopropylidene-5,6-anhydro-β-D-allo- and -α-L-talo-furanosyl)cytosine (4) and (5), an epoxide mixture obtained in two steps from protected cytidine, gave 4-acetamido-1-(2,5′:2,6′-dianhydro-2′,3′-O-isopropylidene-α-L-talofuranosyl)-1,2-dihydropyrimi-dine (7), the constitution of which was confirmed by X-ray crystallography.
4- N-乙酰基-1-(2,3 - O-异亚丙基-5,6-脱水-β - D - allo-和-α- L -talo-呋喃糖基)胞嘧啶的三氟化硼-醚异构化反应(4)和(5),由保护的胞苷分两步得到的环氧化物混合物,得到4-乙酰氨基-1-(2,5':2,6'-dianhydro-2',3' - O-异亚丙基-α- L -talofuranosyl)-1,2-dihydropyrimi-dine(7),其结构通过X射线晶体学证实。