Easily available material, β-(1-chlorovinyl)-β-propiolactone reacted with organocopper reagents to afford 4-chloro-3-alkenoic acids in high yields. The acids were easily transformed into two kinds of useful carboxylic acids such as 4-oxoalkanoic and 4-oxo-(E)-2-alkenoic acids leading to various natural products.
易获得的材料β-(1-
氯乙烯基)-β-
丙烯内酯与
有机铜试剂反应,能够高产率生成4-
氯-3-烯酸。这些酸很容易转化为两种有用的
羧酸,如4-氧烷酸和4-氧-(E)-2-烯酸,从而衍生出各种天然产品。