A Convenient On-Site Oxidation Strategy for the N-Hydroxylation of Melanostatin Neuropeptide Using Cope Elimination
作者:Ivo E. Sampaio-Dias、Sara C. Silva-Reis、Beatriz L. Pires-Lima、Xavier Cruz Correia、Hugo F. Costa-Almeida
DOI:10.1055/a-1695-1095
日期:2022.4
N-hydroxylation of proline residue in Melanostatin (MIF-1) neuropeptide is reported. This methodology is grounded on the incorporation of N-(cyanoethyl)prolyl residue followed by on-site oxidation by Cope elimination with m-chloroperbenzoic acid, exploring the unrecognized dual role of the cyanoethyl group as an effective N-protecting group under peptide synthesis conditions and as a suitable leaving group during
报道了一种方便的合成方案,用于对黑素抑制素 (MIF-1) 神经肽中脯氨酸残基进行前所未有的N-羟基化。该方法基于引入N- (氰乙基)脯氨酸残基,然后通过用间氯过苯甲酸进行 Cope 消除进行现场氧化,探索了在肽合成条件下氰乙基作为有效N-保护基团的未被认识的双重作用并在化学选择性现场N-氧化过程中作为合适的离去基团。按照该协议, N-羟基-MIF-1 以 78% 的全球收率从N- (氰乙基)-中获得l-脯氨酸。这种合成方法为直接应用于神经化学和帕金森氏症研究的N-羟基化黑色素抑制素类似物开辟了一条新途径。