A new, fast and straightforward method for the one-pot reaction of aromatic and aliphatic aldehydes and dialdehydes with ethyl cyanoacetate and cyanogen bromide was developed to afford stereoselectively diethyl 1,2-dicyano-3-alkyl/arylcyclopropane-1,2-dicarboxylate in excellent yields and short reaction time (about 5 s). The structures were characterized by IR, 1H NMR and 13C NMR spectroscopy. The reaction mechanism was discussed.
开发了一种新的、快速且直接的一锅反应方法,用于芳香和脂肪醛以及二醛与
氰乙酸乙酯和
溴化氰的反应,以高产率和短反应时间(约5秒)选择性地合成
二乙基1,2-二
氰基-3-烷基/芳基
环丙烷-1,2-二
羧酸酯。通过红外光谱(IR)、氢核磁共振(1H NMR)和碳核磁共振(13C NMR)对其结构进行了表征。讨论了反应机理。