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 Sonogashiracoupling reaction for alkynylation of unprotectedhalonucleosides in an aqueoussolvent. 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