and solvent-free synthesis, are developed for the synthesis of 3-methyl-1-phenylchromeno[4,3-c]pyrazol-4(1H)-ones(2) from the cyclization of 3-[1-(phenyl-hydrazono)ethyl]-chromen-2-ones(1). Compared with air oxidation, catalytic oxidation can increase the rate of the cyclization of compound 1, and the solvent-free synthesis showed advantages of no organic solvent pollution, elevated reaction rate, and
摘要 开发了空气氧化、催化氧化、无溶剂合成等新方法合成3-甲基-1-苯基色基[4,3-c]
吡唑-4(1H)-酮(2)来自 3-[1-(苯基-腙)乙基]-chromen-2-ones(1) 的环化。与空气氧化相比,催化氧化可以提高化合物1的环化速率,无溶剂合成具有无有机溶剂污染、反应速率提高、选择性高等优点。图形概要