Investigation of 8-Aza-7-Deaza Purine Nucleoside Derivatives
作者:Hang Ren、Haoyun An、Jingchao Tao
DOI:10.3390/molecules24050983
日期:——
6-amino-4-methoxy-1H-pyrazolo[3,4-d]pyrimidine and its iodo- and bromo- analogues with the protected ribofuranose and 2'-deoxyribofuranose under different conditions resulted in the synthesis of N⁸- and N⁸-glycosylated purine nucleosides. Five key intermediate nucleosides, having 6-methoxy, 7-iodo, and 2-bromo groups, were further derivatized to 23 final 8-aza-7-deazapurine nucleoside derivatives. The structures
8-Aza-7-deaza-2?,3?-dideoxyguanosine: Deoxygenation of its 2?deoxy-?-D-ribofuranoside
作者:Frank Seela、Hansj�egen Driller
DOI:10.1002/hlca.19880710410
日期:1988.6.15
The synthesis of 6-amino-1-(2′,3′-dideoxy-β-D-glycero-pentofuranosyl)-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one ( =8-aza-7-deaza-2′,3′-dideoxyguanosine; 1) from its2′-deoxyribofuranoside 5a by a five-step deoxygenation route is described. The precursor of 5a, 3a, was prepared by solid-liquid phase-transfer glyscosylation which gave higher yields (57%) than the liquid-liquid method. Ammonoloysis of 3b
6-氨基-1-(2',3'-二脱氧-β-D-甘油-呋喃呋喃糖基)-1 H-吡唑并[3,4- d ]嘧啶-4(5 H)-one(= 8描述了通过五步脱氧途径从其2′-脱氧核糖呋喃糖苷5a中得到的-aza-7-deaza-2′,3′-二脱氧鸟苷;1)。通过固-液相转移糖基化制备5a,3a的前体,其产率比液-液法高(57%)。3b的氨甲酰苯胺提供了二氨基核苷3c。与2',3'-二脱氧鸟苷(2)相比,化合物1在N-糖基键上对酸的敏感性较低。