Synthesis of novel α-amino-acids and derivatives using radical chemistry: synthesis of - and -α-amino-adipic acids, -α
作者:Derek H.R. Barton、Yolande Hervé、Pierre Potier、Josiane Thierry
DOI:10.1016/s0040-4020(01)90305-9
日期:1987.1
Radicals generated by photolysis (W light) of suitably protected amino-acid derivatives of -hydroxy-2-thiopyridone add efficiently to activated olefins to afford satisfactory yields of adducts. Oxidation of the thiopyridyl residue to sulphoxide and thermal elimination afford excellent yields of the corresponding α, β-unsaturated derivatives. Lateral chain decarboxylation of suitably protected aspartic
由适当保护的-羟基-2-硫代吡啶酮的氨基酸衍生物经光解(W光)产生的自由基可有效地添加到活化的烯烃中,以提供令人满意的加合物收率。硫代吡啶基残基被氧化成亚砜并进行热消除,可获得极好的产率的相应的α,β-不饱和衍生物。适当保护的天冬氨酸和谷氨酸的侧链脱羧提供了L-α-和D-α-氨基己二酸,-α-氨基庚二酸和-α-氨基-δ-脱氢庚二酸的方便的合成。