I2/DMAP 作用下醛和1,3-二羰基化合物环加成反应生成二氢呋喃和环丙烷衍生物

n efficient and practical methodology for the oxidative addition reaction of various aldehydes with 5,5-dimethyl-cyclohexane-1,3-dione (dimedone) and 1,3-indanedione to afford dihydrofuran and cyclopropane derivatives, respectively, promoted by molecular iodine under mechanical milling conditions has been demonstrated. The products were obtained in good to excellent yields. A possible mechanism of this unusual reaction process was proposed.