Preparation of the .alpha. and .beta. anomers of 9-(3,5-dideoxy-D-glycero-pent-4-enofuranosyl)adenine and their activity with leukemia L1210 cells in vitro
作者:Leon M. Lerner
DOI:10.1021/jm00349a011
日期:1982.7
correct. A new synthesis of 5 is described. 3,5-Dideoxy-5-iodo-1,2-O-isopropylidene-alpha-D-erythro-pentofuranose (1) and 3,5-dideoxy-5-iodo-1,2-O-isopropylidene-beta-L-threo-pentofuranose (6) were prepared as starting materials. The isopropylidene groups were exchanged for acetyl groups by acetolysis, and the resulting diacetates (2 and 7) were isopropylidene groups were coupled with 6-(benzamidochloromercuri)purine
先前报道的9-(3,5-二脱氧-β-D-甘油-戊-4-enofuranosyl)腺嘌呤的制备方法(5)不正确。描述了5的新合成。3,5-二甲氧基-5-碘-1,2-O-异亚丙基-α-D-赤-戊呋喃糖(1)和3,5-二甲氧基-5-碘-碘-1,2-O-异亚丙基-β-L制备了苏式-戊-戊呋喃糖(6)作为起始原料。通过乙酰分解将异亚丙基交换为乙酰基,并且通过四氯化钛方法将所得的二乙酸酯(2和7)与异亚丙基与6-(苯甲酰氨基氯汞)嘌呤偶联。通过色谱法将被保护的核苷(3和8)与未反应的糖分离,并用1,8-二氮杂双环-[5.4.0] undec-7-烯处理,然后除去保护基团。9-(3,5-dideoxy-D-glycerpent-pent-4-enofuranosyl)Adenine(4 and 5,的α和β端基异构体 分别以3:1的比例从3中获得。7与碱的缩合以更高的收率得到β-核苷5。未检测到4。当在