Synthesis of β-amino-acid peptides. Part 2. Preparation of peptides of 3-amino-2,2-dimethylpropionic acid by means of conventional coupling reagents and with oxazin-6-one derivatives
作者:Charles N. C. Drey、Richard J. Ridge
DOI:10.1039/p19810002468
日期:——
Side reactions were encountered during the coupling of 3-amino-2,2-dimethylpropionic acid (β-Api) derivatives, some of which could be directly ascribed to steric hindrance at the carboxy-group. Protected and deprotected tri- and hexa-peptides were prepared using dicyclohexylcarbodi-imide and hydroxybenzotriazole. Alternative procedures employing oxazin-6-ones were not as useful as expected.
在3-氨基-2,2-二甲基丙酸(β-Api)衍生物偶联过程中遇到了副反应,其中一些可以直接归因于羧基的位阻。使用二环己基碳二亚胺和羟基苯并三唑制备受保护和脱保护的三肽和六肽。使用oxazin-6-ones的替代程序没有预期的有用。