Methyl 1-butyl-2,4-dioxo-1,2,3,4-tetrahydronaphthalene-1-carboxylate 、
tris-methylsulfanyl-methane sulfuric acid monomethyl ester salt 在
吡啶 作用下,
以
1,4-二氧六环 为溶剂,
反应 3.0h,
以90%的产率得到methyl 3-[bis(methylthio)methylene]-1-butyl-2,4-dioxo-1,2,3,4-tetrahydronaphthalene-1-carboxylate