Synthesis and antiviral/antitumor activities of certain pyrazolo[3,4-d]pyrimidine-4(5H)-selone nucleosides and related compounds
作者:Bheemarao G. Ugarkar、Howard B. Cottam、Patricia A. McKernan、Roland K. Robins、Ganapathi R. Revankar
DOI:10.1021/jm00374a015
日期:1984.8
persilylated 4-chloro-6-methyl-pyrazolo [3,4-d]pyrimidine (7) with tetra-O-acetylribofuranose (8) provided the key intermediate 4-chloro-6-methyl-1-(2,3,5-tri-O-acetyl-beta-D-ribofuranosyl) pyrazolo[3,4-d]pyrimidine (9). Ammonolysis of 9 gave 4-amino-6-methyl-1-beta-D-ribofuranosylpyrazolo[3,4-d]pyrimidine (10), whereas treatment with sodium hydroxide gave 6-methylallopurinol ribonucleoside (11a).
几种吡唑并[3,4-d]嘧啶-4(5H)-硒代核糖核苷被制备为潜在的抗寄生虫剂。用硒基脲处理4-氯-1-(2,3,5-三-O-乙酰基-β-D-呋喃呋喃糖基)吡唑并[3,4-d]嘧啶(5a),然后脱乙酰化,得到1-β-D -核呋喃糖基吡唑并[3,4-d]嘧啶-4(5H)-硒酮(6a)。用硒脲对3-溴-4-氯-1-(2,3,5-三-O-苯甲酰基-β-D-呋喃呋喃糖基)吡唑并[3,4-d]嘧啶(5b)进行类似处理脱苯甲酰化,得到6a(6b)的3-溴衍生物。氨基甲酸酯化的4-氯-6-甲基-吡唑并[3,4-d]嘧啶(7)与四-O-乙酰基呋喃核糖的糖基化作用提供了关键的中间体4-氯-6-甲基-1-(2,3) ,5-(3-三-O-乙酰基-β-D-呋喃呋喃糖基)吡唑并[3,4-d]嘧啶(9)。进行9的氨解反应得到4-氨基-6-甲基-1-β-D-呋喃呋喃糖基吡唑并[3,4-d]嘧啶(10),而用氢氧化钠处理