Amino Acids and Peptides; 70.<sup>1</sup>Optically Active α-Amino Acids,<i>N</i>-Boc-Aminoaldehydes and α-Amino-β-hydroxy Acid from 2,3-Epoxy Alcohols
作者:Ulrich Schmidt、Mathias Respondek、Albrecht Lieberknecht、Jürgen Werner、Peter Fischer
DOI:10.1055/s-1989-27216
日期:——
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)。