Nucleosides and nucleotides. 116. Convenient syntheses of 3-deazaadenosine, 3-deazaguanosine, and 3-deazainosine via ring closure of 5-ethynyl-1-β-D-ribofuranosylimidazole-4-carboxamide or -carbonitrile
作者:Noriaki Minakawa、Akira Matsuda
DOI:10.1016/s0040-4020(01)86259-1
日期:1993.1
An easy chemical synthesis of 3-deazapurine nucleosides, 3-deazainosine [1-β-D-ribofuranosylimidazo[4,5-c]pyridin-4(5H)-one (8)], 3-deazaguanosine [6-amino-1-β-D-ribofuranosylimidazo[4,5-c]pyridin-4(5H)-one (23)], and 3-deazaadenosine [4-amino-1-β-D-ribofuranosylimidazo[4,5-c]pyridine (29)] is described. The approach consists of ring closure between substituents at 4- and 5-positions of the imidazole
3-deazapurine核苷,3-deazainosine [1-β-D-呋喃呋喃基嘧啶并[4,5- c ] pyridin-4(5 H)-one(8)],3-deazaguanosine [6-amino- 1-β-D-呋喃呋喃基咪唑并[4,5- c ]吡啶-4(5 H)-one(23)]和3-脱氮杂腺苷[4-氨基-1-β-D-呋喃呋喃基咪唑并[4,5- c]描述了[吡啶(29)]。该方法包括在咪唑环的4-位和5-位的取代基之间的闭环。5-乙炔基-1-β-D-呋喃呋喃基氨基咪唑-4-羧酰胺的处理(2),可以很容易地从AICA核糖苷中获得(1)),先后用二甲胺水溶液和乙酸水溶液,以64%的收率得到8。5-(2-羟基亚氨基乙基)-1-(2,3,5-三- ø -叔丁基二-β-d-D-呋喃核糖基)咪唑-4-甲酰胺(19)从合成3由治疗的二甲胺水溶液,接着由盐酸羟胺制成。通过苯基异氰酸酯实现19