The 1:1 mixture of cis:trans epoxy-amides 5c was obtained quantitatively by condensation of 2,3-O-isopropylidene-D-glyceraldehyde 1 with N,N-diethyl diazoacetamide. Similarly, the reaction of 1 with methyl diazopropionate was studied and gave as the main product the β-ketoester 4b (product of a 1,2-hydrogen shift) and, in a low yield, the glycidic ester 5b (intramolecular nitrogen displacement). The
通过将2,3-O-异亚丙基-D-
甘油醛1与N,N-
二乙基重氮乙酰胺缩合,定量获得顺式:反式环氧酰胺5c的1∶1混合物。类似地,研究了1与重氮
丙酸甲酯的反应,并以β-
酮酸酯4b(1,2-氢转移的产物)为主要产物,并以低收率得到了
缩水甘油酯5b(分子内氮置换)。两个反应的所得
环氧化物在C-3处的构型表明加成步骤是完全立体选择性的。在相似的条件下,化合物6的3-羟基-2-重氮
丙酸甲酯没有反应性,但是加热得到7。