34680-70-1
methyl 2-hydroxy-3-methylbut-3-enoate
→
~89%
55674-16-3
methyl 3-methyl-2-oxobut-3-enoate
553-90-2
草酸二甲酯
+
13291-18-4
异丙烯基溴化镁
~88%