An efficient synthetic protocol for the polysubstituted cyclopropyl 2,5-dihydrofuran-3-carboxylate was developed by the triphenylphosphine catalyzed domino reaction of dialkyl acetylenedicarboxylate with 3-aryl-2-benzoylcyclopropane-1,1-dicarbonitrile at room temperature. A special feature of the reaction is the retention of the cyclopropane ring.
通过三苯基膦催化的双烯丙二羧酸二烷基与3-芳基-2-苯甲酰基环丙烷-1,1-二氰基在室温下的串联反应,成功开发了一种高效的合成多取代环丙基2,5-二氢呋喃-3-羧酸酯的方法。该反应的一个特点是环丙烷环的保留。