作者:Jarkko Roivainen、Jouko Vepsäläinen、Alex Azhayev、Igor A. Mikhailopulo
DOI:10.1016/s0040-4039(02)01472-7
日期:2002.9
Methyl 1-O-mesyl-5-O-toluoyl-β-d-psicofuranoside (5) was synthesised from the known 1,3;4,5-di-O-isopropylidene-β-d-psicofuranose (1) as a key carbohydrate precursor for the preparation of anhydro psicofuranosyl nucleosides. Transformation of 5 into acetate 7 or bromide 10 followed by (i) coupling with persilylated N6-benzoyladenine in the presence of SnCl4, and (ii) treatment with MeONa/MeOH gave
甲基1- ø -mesyl -5- ö甲苯甲酰-β-d-psicofuranoside(5 -4,5-二- ;)从已知的合成1,3- ø异亚丙基-β-d-psicofuranose(1),其为制备脱水呋喃呋喃糖基核苷的关键碳水化合物前体。将5转化为乙酸7或溴化物10,然后(i)在SnCl 4存在下与全硅烷基化的N 6-苯甲酰腺嘌呤偶联,和(ii)用MeONa / MeOH处理得到1',3'-脱水核苷9。在类似的反应顺序中使用甲硅烷基胸腺嘧啶可提供1',4'-脱水核苷12。阻塞的反应11用NH 3 / MeOH洗脱,得到ø 2 1,1'-脱水核苷13,将其重新排列为12时的MeONa / MeOH中处理。脱保护后,将1',3'-脱水糖15与甲硅烷基化的胸腺嘧啶缩合,得到1',3'-脱水核苷16。