[5-(Adenin-9-yl)-5-deoxypentofuranosyl]phosphonates, a new type of nucleotide analogs with fixed HPMPA structure, have been prepared. The synthesis of compounds of L-arabino (IIa, IIb), D-arabino(XIVa, XIVb), 2-deoxy-L-erythro(IIIa, IIIb) and 2-deoxy-L-threo(IVa, IVb) configuration is based on the Michelis-Arbuzov reaction of the fully protected methyl glycosides with triethyl phosphite and trimethylsilyl triflate which leads to anomeric mixture of diethyl (L-pentofuranosyl) phosphonates. The protected 5-O-tosyl derivatives react with sodium salt of adenine to give N9-substituted products which after total deprotection afforded the tittle nucleotide analogs. The fixation of the partial structure of HPMPA to form five-membered ring leads to a significant decrease, or a total loss, of biological activity.
已经制备了一种新型核苷酸类似物,即[5-(
腺嘌呤-9-基)-5-脱氧戊糖基]
磷酸酯,其具有固定的H
PMPA结构。L-
阿拉伯 (
IIa, IIb)、D-
阿拉伯 (
XIVa, XIVb)、2-脱氧-L-
赤 (
IIIa, IIIb) 和2-脱氧-L-
顺 (
IVa, IVb) 配置的化合物的合成基于全保护甲基糖苷与三
乙基磷酸酯和三甲基
硅基
三氟甲烷的Michelis-Arbuzov反应,导致
二乙酰(L-戊糖基)
磷酸酯的异构混合物。保护的5-
O-
甲苯磺酰衍
生物与
腺嘌呤的钠盐反应,得到N
9-取代产物,经过全去保护后得到所需的核苷酸类似物。将H
PMPA的部分结构固定形成五元环,导致
生物活性显著降低或完全丧失。