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。