Synthesis and halocyclization of 2-mercaptonicotinic acid propargyl derivatives
作者:Elena V. Kalita、Dmitry G. Kim、Oleg S. Eltsov、Taisiya S. Shtukina、Irina V. Mukhametgaleeva
DOI:10.1007/s10593-019-02483-9
日期:2019.5
Alkylation of 2-sulfanylpyridine-3-carboxylic acid with 3-bromo-1-propyne proceeds with the formation of 2-(prop-2-yn-1-ylsulfanyl)-pyridine-3-carboxylic acid and prop-2-yn-1-yl 2-(prop-2-yn-1-ylsulfanyl)pyridine-3-carboxylate, which react with bromine and iodine to form 2,3-dihydro[1,3]thiazolo[3,2-a]pyridinium systems.
2-磺酰胺基吡啶-3-羧酸与3-溴-1-丙炔的烷基化反应继而形成了2-(prop-2-yn-1-ylulfanyl)-吡啶-3-羧酸和prop-2-yn- 1-(2--2-丙-2-炔-1-基硫烷基)吡啶-3-羧酸酯,与溴和碘反应形成2,3-二氢[1,3]噻唑并[3,2- a ]吡啶鎓体系。