4-Aryl-3-bis(methylthio)methylene-4-oxobutanenitriles 1a-e undergo cyclocondensation with hydrazine hydrate to give novel 6-aryl-5-bis(methylthio)methyl-3(2H)-pyridazinones 3a-e in good yields. The reaction of ketene dithioacetal 1b with hydroxylamine afforded only the open-chain amidoxime 4.
4-Aryl-3-bis(methylthio)methylene-4-oxobutanenitriles 1a-e与
水合
肼发生环缩合反应,生成新型6-aryl-5-bis(methylthio)methyl-3(2H)-pyridazinones 3a-e,收率较高。
烯酮二硫代缩醛1b与
羟胺反应仅生成开链
肟4。