某些三环核苷与二氢咪唑,咪唑,三唑或四唑或与四唑环稠合在角位置的吡唑并[3,4- d ]嘧啶环系统(C-4和N-5)上的合成已完成。通过对4-氯-1-(2,3,5-三-O-乙酰基-β - D-核呋喃呋喃糖基)吡唑并[3,4-]的氯原子进行亲核置换,制得4-氮丙啶基衍生物(2)。d ]嘧啶(1)与亚乙基亚胺。然后用碘化钠处理核苷(2),得到7-(β- D-呋喃核糖基)-2,3-二氢咪唑并[ 1,2- c ]吡唑并[4,3- e ]嘧啶(3)。(1)与叠氮化锂的反应得到7-(2,3,5-tri- O-乙酰基-β - D-呋喃核糖基吡唑并[4,3- e ]-四唑并[1,5- c ]嘧啶(5)和4-氨基-1-(β- D-呋喃核糖基)吡唑并环化[3, 4- d ]嘧啶与氯乙醛一起提供了三环核苷7-(β- D-呋喃呋喃糖基)咪唑并[1,2- c ]吡唑并[4,3- e ]嘧啶(7)。将2,4-二硝基苯恶胺用4-氨基-1-(β-
Pyrazolo[3,4-d]pyrimidine ribonucleosides as anticoccidials. 2. Synthesis and activity of some nucleosides of 4-(alkylamino)-1H-pyrazolo[3,4-d]pyrimidines
作者:Janet L. Rideout、Thomas A. Krenitsky、George W. Koszalka、Naomi K. Cohn、Esther Y. Chao、Gertrude B. Elion、Victoria S. Latter、Raymond B. Williams
DOI:10.1021/jm00351a007
日期:1982.9
A series of 4-(alkylamino)-1-beta-D-ribofuranosyl-1H-pyrazolo[3, 4-d]pyrimidines was synthesized by enzymatic and chemical methods. On the basis of the previous finding that 4-(alkylthio)-1-beta-D-ribofuranosyl-1H-pyrazolo[3,4-d]pyrimidines were effective anticoccidial agents, this series was examined for efficacy against Eimera tenella in chicks. The most active anticoccidial agent in the present