SYNTHESIS OF N-PHOSPHOPEPTIDES COUPLED BY DICHLOROTRIPHENYLPHOSPHORANE
摘要:
Coupling of N-phosphoamino acids 2 and amino acid methyl esters by dichlorotriphenylphosphorane 3 produced N-phosphopeptide methyl esters 5, which were sequentially hydrolyzed in triethylamine or dilute NaOH aqueous solution. The target products N-phosphodipeptides 6 were obtained in reasonable yields and high purity after isolation using extraction method. The convenient and efficient approach could be generally used for synthesis of polypeptides.
生物分子同手性的起源仍然是生命起源化学最迷人的方面之一。已经报道了手性化合物的各种放大策略,以增强小的手性偏好,但这些策略均不涉及磷酸化,而磷酸化是自然界的基本化学反应之一。在这里,我们提出了一个简单而可靠的基于磷酸化的水中胺和氨基酸手性扩增的概念。通过利用外消旋氨基磷酸酯及其对映体纯形式的溶解度差异,我们实现了溶液中的对映体富集。从近外消旋的基于苯乙胺的氨基磷酸酯开始,在单个扩增步骤中可达到高达 95%的 ee 。特别值得注意的是磷酸化氨基酸及其衍生物的对映体富集,这可能表明磷在形成益生元纯手性过程中的潜在作用。
N-(Diisopropyloxyphosphoryl)amino acids (N-Dipp-amino acids) are prepared from diisopropyl phosphite and amino acids in mixed aqueous media in one step. They can be activated by dicyclohexylcarbodiimide or other activating agents for the synthesis of N-(diisopropyloxyphosphoryl)dipeptides.