Unnatural polar α-aminoxy acid residue with proteingenous hydroxymethyl side chain, a building block of the peptidomimetic foldamer of α-aminoxy peptide, was synthesized starting from natural amino acid L-serine. The starting material, L-serine, undergoes a reaction sequence to produce compound 1 in three steps: (1) the neighboring carboxyl group participates in diazotization/bromination to transform
                                    从天然
氨基酸 L-丝氨酸开始合成具有蛋白源性羟甲基侧链的非天然极性 
α-氨基酸残基,这是 α-
氨氧基肽的拟肽折叠体的构建块。起始原料 
L-丝氨酸经过一个反应序列,分三步产生化合物 1:(1) 相邻的羧基参与重氮化/
溴化,将
氨基转化为
溴基,(2) C-末端羧基基团受到保护,并且 (3) 
溴化物被 N-羟基邻苯二甲
酰亚胺 SN2 取代以引入 N-O 键。经过几次常规的脱保护/偶联反应后,化合物1很容易转化为α-
氨氧基二酰胺,可广泛用于拟肽设计。