Thiazolo[4,5-d]pyrimidine nucleosides. The synthesis of certain 3-.beta.-D-ribofuranosylthiazolo[4,5-d]pyrimidines as potential immunotherapeutic agents
作者:Katsuhiko Nagahara、Jack D. Anderson、Ganesh D. Kini、N. Kent Dalley、Steven B. Larson、Donald F. Smee、Ai Jin、Brahma S. Sharma、Weldon B. Jolley
DOI:10.1021/jm00163a064
日期:1990.1
Novel analogues of the naturally occurring purine nucleosides were synthesized in the thiazolo[4,5-d]pyrimidine ring system to determine the immunomodulatory effects of insertion of a sulfur atom in place of nitrogen at position 7 of the purine ring. In particular, 5-amino-3-beta-D-ribofuranosylthiazolo[4,5-d]pyrimidine-2,7(3H,6H) -dione (7, guanosine analogue), 3-beta-D-ribofuranosylthiazolo[4,5-d]pyrimidine-2
在噻唑并[4,5-d]嘧啶环系统中合成了天然存在的嘌呤核苷的新类似物,以确定在嘌呤环第7位插入硫原子代替氮的免疫调节作用。特别是5-氨基-3-β-D-呋喃核糖基噻唑并[4,5-d]嘧啶-2,7(3H,6H)-二酮(7,鸟苷类似物),3-β-D-呋喃核糖基噻唑并[4, 5-d]嘧啶-2,5,7(3H,4H,6H)三酮(8,黄嘌呤类似物),3-beta-D-呋喃呋喃糖基噻唑并[4,5-d]嘧啶-2,7(3H,6H) -dione(10,肌苷类似物)和7-amino-3-beta-D-rifurfuranosylthiazolo [4,5-d] pyrimidin-2(3H)-1(32,腺苷类似物)以及8 -巯基鸟苷(14)和6-巯基鸟苷(17)类似物。单晶X射线研究证实17和32的结构分配具有β构型,在N3处有糖基化位点。与已知的活性剂8-溴鸟苷(1),8-巯基鸟苷(2)和7-甲基-8-氧代鸟