An efficient dual-catalyst system of piperidine and molecular iodine has been developed for the synthesis of 2-alkyl-2-(2-oxo-2H-chromen-3-yl)-2,3-dihydro-4(1H)quinazolinone derivatives by a four-component reaction of salicylaldehydes, β-keto esters, ammonium acetate, and isatoic anhydride. Good yields, mild reaction conditions, and easy purification are attractive features of the present method.
已开发出一种高效的
哌啶和分子
碘双催化剂体系,用于合成 2-烷基-2-(2-oxo-2H-chromen-3-yl)-2,3-dihydro-4(1H)quinazolinone 衍
生物通过
水杨醛、β-
酮酯、
乙酸铵和
靛红酸酐的四组分反应。良好的收率、温和的反应条件和易于纯化是本方法的吸引人的特点。