2′-Deoxy-2′,2′-difluorothymidine analogues for radiolabeling with fluorine-18 and other biomedical applications
作者:Andreas M. Doepner、Eric O. Aboagye、Anthony G.M. Barrett
DOI:10.1016/j.tetlet.2014.12.051
日期:2015.6
Novel 2′-deoxy-2′,2′-difluorothymidine analogues with potential applications as antiviral, cytotoxic and cancer imaging agents have been synthesized. Introduction of the hydroxymethyl functionality at the 5-position of 2′-deoxy-2′,2′-difluoruridine provided a key intermediate with a suitable synthetic handle for the generation of these nucleoside derivatives.
The title compound 2-Deoxy-3,5-di-O-benzoyl-2,2-difluoro-D-ribose (17), was synthesised from D-glucose and from D-mannose. The key steps of the synthesis from D-glucose are obtaining the 3,3-difluoropyranose 9 by reacting the ulose 7 with DAST. and their conversion into the difluorofuranoside 17 by a degradative reaction of diol 16. Starting from D-mannose the synthesis obtains the 3,3-difluoroglycal 22 by reaction of the ulose 18 with DAST and oxidation-elimination of selenoglycoside 21. Ozonolysis of 22 gives the difluorofuranose 17. (C) 1998 Elsevier Science Ltd. All rights reserved.
Chemical synthesis of 4′-thio and 4′-sulfinyl pyrimidine nucleoside analogues
作者:Mieke Guinan、Ningwu Huang、Chris S. Hawes、Marcelo A. Lima、Mark Smith、Gavin J. Miller
DOI:10.1039/d1ob02097h
日期:——
block that enables access to thio-ribo and thio-arabino pyrimidine nucleosides, alongside their 4′-sulfinyl derivatives. In addition, this building block methodology is templated to deliver 4′-thio and 4′-sulfinyl analogues of the established anticancer drug gemcitabine. Cytotoxic capability of these new analogues is evaluated against human pancreatic cancer and human primary glioblastoma cell lines, with