Synthesis of 6-amino-1,2,3-triazolo[4,5-<i>c</i>] pyridin-4(5<i>H</i>)one (8-aza-3-deazaguanine) and 6-amino-1-(β-D-ribofuranosyl)-1,2,3-triazolo[4,5-<i>c</i>] pyridin-4(5<i>H</i>)one (8-Aza-3-deazaguanosine)<i>via</i>novel ring closure procedures
作者:Ric H. B. Meyer、Ganapathi R. Revankar、P. Dan Cook、Kenneth W. Ehler、Martin P. Schweizer、Roland K. Robins
DOI:10.1002/jhet.5570170132
日期:1980.1
The total synthesis of 6-amino-1,2,3-triazolo[4,5-c]pyridin-4(5H)one (8-aza-3-deazaguanine, 3) and 6-amino-1-(β-D-ribofuranosyl)-1,2,3-triazolo[4,5-c]pyridin-4(5H)one (8-aza-3-deazaguano-sine, 22) has been described for the first time by a novel base-catalyzed ring closure of 4(5)-cyanomethyl-1,2,3-triazole-5(4)carboxamide (14) and methyl 5-cyanomethyl-1-(2,3,5-tri-O-ben-zoyl-β-D-ribofuranosyl)-1,2
6-氨基-1,2,3-三唑并[4,5- c ]吡啶-4(5 H)一(8-氮杂-3-脱氮鸟嘌呤,3)和6-氨基-1-(β的全合成-D-呋喃呋喃糖基)-1,2,3-三唑并[4,5- c ]吡啶-4(5 H)-one(8-aza-3-deazaguano-sine,22)首次被描述为的4(5)氰甲基-1,2,3-三唑-5(4)羧酰胺新颖碱催化的环闭合(14)和5-氰基甲基-1-(2,3,5-三- ö -ben -唑基-β-D-呋喃核糖基)-1,2,3-三唑-4-羧酸盐(17)。在DBU的催化下,1,3-丙酮二羧酸二甲酯的2,4-二硝基苯hydr (7)将其通过2-重氮-3-亚氨基戊二酸二甲酯(8)转化为5-甲氧基羰基甲基-1-(2,4-二硝基苯胺基)-1,2,3-三唑-4-羧酸甲酯(12 )。催化还原12得到4(5)甲氧基羰基甲基-1,2,3-三唑-5(4)羧酸甲酯(11),从其中甲基4(5)氨甲酰基甲基1