Synthesis of 2-(β-D-ribofuranosyl)pyrimidines, A new class of<i>C</i>-nucleosides
作者:Timothy A. Riley、William J. Hennen、N. Kent Dalley、Bruce E. Wilson、Roland K. Robins、Steven B. Larson
DOI:10.1002/jhet.5570240413
日期:1987.7
A new C-glycosyl precursor for C-nucleoside synthesis, 2,5-anhydroallonamidine hydrochloride (4) was prepared and utilized in a Traube type synthesis to prepare 2-(β-D-ribofuranosyl)pyrimidines, a new class of C-nucleosides. The anomeric configuration of 4 was confirmed by single-crystal X-ray analysis. Reaction of 4 with ethyl acetoacetate gave 6-methyl-2-(β-D-ribofuranosyl)pyrimidin-4-(1H)-one (5)
制备了一种新的用于C-核苷合成的C-糖基前体2,5,5-脱水氢lon啶盐酸盐(4),并用于Traube型合成中制备了2-(β-D-核呋喃呋喃糖基)嘧啶,一类新的C-核苷。 。通过单晶X射线分析确认了4的异头构型。4与乙酰乙酸乙酯的反应得到6-甲基-2-(β-D-呋喃呋喃糖基)嘧啶-4-(1 H)-一(5)。4与草酰二乙酸二乙酯反应,得到2-(β-D-呋喃呋喃糖基)嘧啶-6(1 H)-氧-4-羧酸(6)。酯化6用氯化氢乙醇溶液得到相应的酯7,当用乙醇氨水处理时,得到2-(β-D-呋喃呋喃糖基)嘧啶-6(1H)-氧代-4-羧酰胺(8)。将2,5-脱水氢lon啶盐酸盐(4)与4-(二甲基氨基)-2-氧代-3-丁烯酸乙酯(9)缩合,得到2-(β-D-呋喃呋喃糖基)嘧啶-4-羧酸乙酯(10)。用乙醇氨处理10,得到2-(β-D-呋喃呋喃糖基)嘧啶-4-羧酰胺(11)。单晶X射线分析证实了11的β-异