Multicomponent reaction involving isatin (1), malononitrile (2), and dimedone (3), in the presence of triphenylphosphine as an efficient catalyst in the eco-friendly solvent ethanol, results in the formation of spirooxindole derivatives 4 i.e 2-Amino-5-oxo-7,7-dimethyl spiro[(4H)-5,6,7,8-tetrahydrochromene-4,3-(3H)-indol]-(10H)-2-onecarbonitrile. The reaction proceeds smoothly under mild conditions and the products are obtained in good to excellent yields. This method is applicable to a variety of isatin derivatives.
多组分反应涉及伊沙啶(1)、马隆腈(2)和二美酮(3),在三苯基
磷作为高效催化剂的环境友好溶剂
乙醇存在下,形成了脊环氧啶衍
生物4,即2-
氨基-5-氧基-7,7-二甲基脊[(4H)-5,6,7,8-四氢色烯-4,3-(3H)-
吲哚]-(10H)-2-
氨基
氰化物。该反应在温和条件下顺利进行,产物的收率良好到优秀。这种方法适用于多种伊沙啶衍
生物。