Trichloroacetimidic esters of 2,3-epoxy alcohols are transformed into oxazolines 5 and dihydrooxazines 6, respectively, depending on the structure of the educts and the catalyst. The five-membered ring compounds 5 are transformed into erythro-α-amino-β-hydroxy acids (60-70% from epoxy alcohols) via oxazolidinones 11, 12, and 13. α-Amino acids and α-substituted α-amino acids 10 as well as the corresponding aldehydes 9 are obtained from the dihydrooxazines 6 (50-60% from epoxy alcohols).
2,3-环氧醇的三
氯乙酰亚
氨酯可分别转化为
噁唑啉类化合物 5 和二氢噁嗪类化合物 6,具体取决于萃取物的结构和催化剂。五元环化合物 5 通过
噁唑烷酮 11、12 和 13 转变成红δ-
氨基δ-²-羟基酸(60-70% 来自环氧醇)。 δ-
氨基酸和δ-取代的δ-
氨基酸 10 以及相应的醛 9 可从二氢噁嗪 6 中获得(50-60% 来自环氧醇)。