Synthesis of <i>C</i>-acyl furanosides <i>via</i> the cross-coupling of glycosyl esters with carboxylic acids
作者:Yongliang Wei、Jenny Lam、Tianning Diao
DOI:10.1039/d1sc03596g
日期:——
which promotes the homolysis of the strong anomeric C–O bond through CO2 evolution to afford glycosyl radicals. This method embraces a large scope of furanoses, pyranoses, and carboxylic acids, and is readily applicable to the synthesis of a thymidine analogue and diplobifuranylone B, as well as the late-stage modification of (+)-sclareolide. The convenient preparation of the redox active glycosyl ester
C-酰基呋喃糖苷是多种天然产物、核苷类似物和药物分子的通用合成前体。本报告通过开发糖基酯和羧酸之间的交叉偶联反应解决了制备C-酰基呋喃糖苷的未解决挑战。一个关键步骤是糖基酯的光氧化还原活化,它通过 CO 2促进强异头 C-O 键的均裂进化以提供糖基自由基。该方法涵盖了大范围的呋喃糖、吡喃糖和羧酸,并且很容易适用于胸苷类似物和二吡呋喃酮 B 的合成,以及 (+)-香紫苏内酯的后期修饰。从天然糖中方便地制备氧化还原活性糖基酯以及与常见呋喃糖的相容性体现了这种方法在药物化学中的潜力。
MAEBA, ISAMU;IIJIMA, TAKASHI;MATSUDA, YOKO;ITO, CHIHIRO, J. CHEM. SOC. PERKIN TRANS. PT 1,(1990) N, C. 73-76