Triethylborane-induced radical cyclization of N-allyl-2-iodo amide proceeded smoothly in water to give the corresponding γ-lactam in good yield. Radical cyclization in acidic media was also effective. Chloroacetamide, combined with sodium iodide, was available as a substrate for the atom transfer radical cyclization in water to furnish the iodomethyl-substituted γ-lactam.
三乙基
硼烷诱导的 N-烯丙基-2-
碘酰胺自由基环化反应在
水中顺利进行,生成相应的 γ-内酰胺,收率良好。在酸性介质中进行自由基环化也很有效。
氯乙酰胺与
碘化钠可作为底物,在
水中进行原子转移自由基环化反应,生成
碘甲基取代的 γ-内酰胺。