material, the products were obtained in good to high yields and in most cases with excellent diastereoselectivites. The synthetic importance of these compounds was demonstrated by the synthesis of 4-amino-2(5H)-furanones, a class of compounds that have shown both biological activity and utility as synthetic intermediates. This transformation was achieved by an intramolecular Blaise reaction, which gave
由一系列不同的醛与α-
溴酰基
氰化物组合,可一步制备O-(α-
溴酰基)
氰醇。通过使用一种循环程序,手性Lewis酸催化的反应中的两种次要非对映异构体经历了南极假丝酵母
脂肪酶B(CALB)催化的
水解,然后进行脱氢
氰化反应再生了起始原料,从而获得了高至高收率的产物。在大多数情况下,具有出色的非对映选择性。这些化合物的合成重要性通过4-amino-2(5 H
呋喃酮,一类既具有
生物学活性又具有合成中间体用途的化合物。该转化是通过分子内布莱斯反应实现的,该反应使产物具有高至优异的产率和对映体比率。