作者:A. A. Zubarev、V. K. Zav’yalova、A. M. Shestopalov
DOI:10.1007/s11172-011-0082-2
日期:2011.3
A reaction of alkyl bromoacetates with substituted 3-cyano-2-methylthiopyridines in the presence of zinc dust furnishes 3-amino-3-(2-methylthiopyridin-3-yl)propenoic esters. Their hydrolysis under mild conditions leads to 3-(2-methylthiopyridin-3-yl)-3-oxopropionic esters. The latter were used in the synthesis of pyridine-substituted pyrazolones.
溴乙酸烷基酯与取代的 3-氰基-2-甲硫基吡啶在锌粉存在下发生反应,生成 3-氨基-3-(2-甲硫基吡啶-3-基)丙烯酸酯。在温和的条件下进行水解,可得到 3-(2-甲硫基吡啶-3-基)-3-氧代丙酸酯。后者被用于合成吡啶取代的吡唑酮。