化学性质:油状液体。
用途:作为克菌定的中间体。
生产方法:通过苯胺与乙酰乙酸乙酯在乙酸参与下的缩合反应制得。
H6P2W18O62·24H2O bulk- and silica-supported catalysts were found to be efficient and recyclable catalysts for the synthesis of a series of β-aminocrotonates using toluene as the solvent or under no solvent reaction conditions. Several substituted β-aminocrotonates can be prepared in very good yields and purity by direct reaction of amines and 1,3-dicarbonyl compounds in the presence of a catalytic amount of bulk- and silica-gel-supported H6P2W18O62·24H2O. The title compounds were prepared in very good yields using both methodologies, and no secondary products were detected. The procedure using no reaction solvent resulted in a clean and useful alternative, which has the advantages of a greener methodology with operative simplicity, the use of a reusable and noncorrosive solid catalyst, soft reaction conditions, low reaction times, and good yields.
Here, we report the synthesis of all major 2-alkyl-4(1