The Synthesis of Thienopyridines from ortho-Halogenated Pyridine Derivatives; Part 2
作者:D. H. Bremner、A. D. Dunn、K. A. Wilson、K. R. Sturrock、G. Wishart
DOI:10.1055/s-1997-1289
日期:1997.8
Synthetic routes to the ortho-halogenated pyridine derivatives, ethyl 2- and 4-chloro-3-pyridylacetate, ethyl 3-bromo-4-pyridylacetate and ethyl 3-bromo-2-pyridylacetate, which have methylene groups activated by the ester functionality are reported. Reaction of these pyridines with carbon disulfide in the presence of sodium hydride, followed by quenching with iodomethane, results in the formation of the corresponding thienopyridines in moderate yields.
邻卤代吡啶衍生物、2-和4-氯-3-吡啶基乙酸乙酯、3-溴-4-吡啶基乙酸乙酯和3-溴-2-吡啶基乙酸乙酯(其具有通过酯官能团活化的亚甲基)的合成路线为报道称。这些吡啶与二硫化碳在氢化钠存在下反应,然后用碘甲烷猝灭,导致以中等产率形成相应的噻吩并吡啶。