Efficient Sonogashira Coupling of Unprotected Halonucleosides in Aqueous Solvents Using Water-Soluble Palladium Catalysts
作者:Joon Hyung Cho、Caitlin D. Prickett、Kevin H. Shaughnessy
DOI:10.1002/ejoc.201000313
日期:2010.7
prompted the continuing development of efficient synthetic methods for their preparation. We report an efficient andenvironmentally benign Sonogashira coupling reaction for alkynylation of unprotected halonucleosides in an aqueous solvent. The combination of Pd(OAc)2, CuI, and TXPTS [trisodium tri(2,4-dimethyl-5-sulfonatophenyl)phosphane] provided an effective catalyst for the alkynylation of 8-bromopurines
C-炔基化核苷的各种应用促进了其制备的有效合成方法的持续发展。我们报告了一种有效且对环境无害的 Sonogashira 偶联反应,用于在水性溶剂中对未受保护的卤代核苷进行炔基化。Pd(OAc)2、CuI 和 TXPTS [三(2,4-二甲基-5-磺基苯基)膦三钠] 的组合为 H2O/CH3CN 中 8-溴嘌呤和 5-碘尿苷的炔基化提供了有效的催化剂 (1 :1) 产率范围为 42 至 98 %。