Methyl trans-4-oxo-2-alkenoates are synthesized in 64-93% yields by successive treatment of 5-substituted 2,2-dimethoxy-2,3-dihydrofurans with N-bromosuccinimide in aqueous acetone and triethylamine in ether.
甲基反-4-氧代-2-烯酸酯通过将5-取代的2,2-二甲氧基-
2,3-二氢呋喃分别与
溴代琥珀
酰亚胺在
水相
丙酮和醚相
三乙胺中处理,合成的产率为64-93%。