Synthesis of 8-amino-4-methylthio-6-methyl-2-(β-D-ribofuranosyl)-2,6-dihydro-1,2,3,5,6,7-hexaazaacenaphthylene and an unusual reductive ring-opening of the 1,2,3,5,6,7-hexaazaacenaphthylene ring system
作者:Andrew M. Kawasaki、Leroy B. Townsend
DOI:10.1002/jhet.5570280101
日期:1991.1
The tricyclic nucleoside 8-amino-4-methylthio-6-methyl-2-(β-D-ribofuranosyl)-1,2,3,5,6,7-hexaazaacenaphthylene (3) was synthesized from 3-cyano-4,6-bis(methylthio)-1-(β-D-ribofuranosyl)pyrazolo[3,4-d]pyrimidine (1). Attempts to synthesize 8-amino-6-methyl-2-(β-D-ribofuranosyl)-1H-2,6-dihydro-1,2,3,5,6,7-hexaazaacenaphthylene (5) ([an aza analog of 6-amino-4-methyl-8-(β-D-ribofuranosyl)-1,3,4,5,8-p
由3-氰基-4合成三环核苷8-氨基-4-甲硫基-6-甲基-2-(β-D-呋喃呋喃糖基)-1,2,3,5,6,7-六氮杂ena烯(3), 6-双(甲硫基)-1-(β-D-呋喃呋喃糖基)吡唑并[3,4- d ]嘧啶(1)。尝试合成8-氨基-6-甲基-2-(β-D-呋喃呋喃糖基)-1 H -2,6-二氢-1,2,3,5,6,7-六氮杂ena烯(5)([aza 6-氨基-4-甲基-8-(β-d-D-呋喃核糖基)-1,3,4,5,8-pentaazaacenaphthylene(TCN)],这是一种有效的抗肿瘤剂),由治疗的模拟3与阮内镍没有提供所需的TCN的氮杂类似物。取而代之的是,确定了3的哒嗪部分的还原性切割。产生4-甲基氨基-6-甲硫基-1-(β-D-呋喃呋喃糖基)-1 H-吡唑并[3,4- d ]嘧啶-3-甲am(6)。假设溶解度在还原步骤中的问题,对异亚丙基衍生物3,8-氨基-6-甲基-4-甲硫基-2-(2