On the syntheses of 8-Heteroaryl-substituted 9-(β-D-Ribofuranosyl)-2,6-diaminopurines through Pd-catalyzed coupling in the presence of cupric oxide
作者:Vita Ozola、Tina Persson、Salo Gronowitz、Anna-Britta Hörnfeldt
DOI:10.1002/jhet.5570320331
日期:1995.5
Convenient methods for the preparation of 9-(β-D-ribofuranosyl) derivatives of 8-(2- and 3-thienyl)-2,6-diaminopurine and of 8-(2- and 3-furyl)-2,6-diaminopurine, which are potential antiviral agents has been worked out. The key step was a Pd(0)-catalyzed Stille coupling between 2- and 3-tributylstannylthiophene and 2- and 3-tributylstannylfuran and trimethylsilyl protected 9-(β-D-ribofuranosyl)-2
制备8-(2-和3-噻吩基)-2,6-二氨基嘌呤和8-(2-和3-呋喃基)-2,6-的9-(β-D-呋喃呋喃糖基)衍生物的简便方法已经研究出潜在的抗病毒药物二氨基嘌呤。关键步骤是在2-和3-三丁基锡烷基噻吩与2-和3-三丁基锡烷基呋喃和三甲基甲硅烷基保护的9-(β-D-呋喃呋喃糖基)-2,6-二氨基-8-溴-之间进行Pd(0)催化的Stille偶联。嘌呤。为了获得快速反应和高收率,必须使用N,N-二甲基甲酰胺在110°下作为溶剂,并使用二氧化(二苯基膦-丙烷)钯(II)[PdCl 2(dppp)]与氧化铜作为共试剂。 。