109364-34-3
2,3-diethoxy-4-hydroxy-4-(2-trimethylsilylethynyl)cyclobut-2-en-1-one
→
~88%
109364-35-4
3-ethoxy-4-(2-trimethylsilylethynyl)cyclobut-3-ene-1,2-dione
5231-87-8
方酸二乙酯
+
1066-54-2
三甲基乙炔基硅