Synthesis of Difluoromethylene-Containing 1,2,4-Oxadiazole Compounds via the Reaction of 5-(Difluoroiodomethyl)-3-phenyl-1,2,4-oxadiazole with Unsaturated Compounds Initiated by Sodium Dithionite - Yang, Xueyan; Wang, Zhonghua; Fang, Xiang; Yang, Xianjin; Wu, Fanhong; Shen, Yongjia (Synthesis, 2007)