Branched-chain C-cyano pyranonucleosides: Synthesis of 3′-C-cyano & 3′-C-cyano-3′-deoxy pyrimidine pyranonucleosides as novel cytotoxic agents
作者:Christos Kiritsis、Stella Manta、Vanessa Parmenopoulou、Jan Balzarini、Dimitri Komiotis
DOI:10.1016/j.ejmech.2011.08.033
日期:2011.11
afford the target 1-(3′-C-cyano-β-D-glucopyranosyl)nucleosides 6a–d. Routine deoxygenation at position 3′ of cyanohydrin 2, followed by hydrolysis and acetylation led to the 3-C-cyano-3-deoxy-1,2,4,6-tetra-O-acetyl-D-allopyranose (10). Coupling of sugar 10 with silylated pyrimidines and subsequent deacetylation yielded the target 1-(3′-C-cyano-3′-deoxy-β-D-allopyranosyl)nucleosides 12a–d. The new analogues
本报告描述3'-的总和简便合成Ç氰基&3'- Ç氰基-3'-脱氧嘧啶pyranonucleosides。3-酮基葡糖苷1与氰化钠反应得到所需的前体 3 - C-氰基-1,2:5,6-二-O-异亚丙基-α -D-呋喃葡萄糖 ( 2 )。水解后乙酰化生成 1,2,3,4,6-penta- O-乙酰-3- C-氰基-D-吡喃葡萄糖 ( 4 )。化合物4分别与甲硅烷基化的 5-氟尿嘧啶、尿嘧啶、胸腺嘧啶和N 4 -苯甲酰胞嘧啶缩合并脱乙酰化得到目标 1-(3'-C-氰基-β -D-吡喃葡萄糖基)核苷6a-d。在氰醇2 的3' 位进行常规脱氧,然后水解和乙酰化产生3- C-氰基-3-脱氧-1,2,4,6-四-O-乙酰基-D-别吡喃糖 ( 10 )。糖10与甲硅烷基化嘧啶的偶联和随后的脱乙酰作用产生了目标 1-( 3'- C -cyano -3' -deoxy - β -D-allopyranosyl)