Synthesis of Unnatural Amino Acids from Serine Derivatives by β-Fragmentation of Primary Alkoxyl Radicals
作者:Alicia Boto、Juan A. Gallardo、Dácil Hernández、Rosendo Hernández
DOI:10.1021/jo071155t
日期:2007.9.1
The fragmentation of primary alkoxyl radicals has been scarcely used in synthesis since other competing processes (such as oxidation or hydrogen abstraction) usually predominate. However, when serine derivatives were used as substrates, the scission took place in excellent yields. Tandem scission−allylation, −alkylation, or −arylation reactions were subsequently developed. This one-pot methodology
伯烷氧基的断裂几乎没有用于合成中,因为其他竞争性过程(例如氧化或夺氢)通常占主导地位。但是,当使用丝氨酸衍生物作为底物时,以高收率进行分裂。随后发展了串联断裂-烯丙基化,-烷基化或-芳基化反应。这种一锅法方法可用于合成非天然氨基酸,非天然氨基酸是拟肽中有用的合成嵌段或氨基酸替代物。