摘要/Abstract

以丙炔酸、仲胺、烷基醛和甲醛为试剂，在过渡金属铜催化下高效地构建了一系列非对称1，4-二氨基-2-丁炔化合物.该多组分一锅二步方法历经A³-脱羧偶联生成关键中间体炔丙胺，随后该中间体加成到原位形成的亚胺离子上，最终以中等到优异的产率得到交叉偶联产物.该策略成功地将脂肪族仲胺引入到反应体系中，具有底物胺兼容性较好的特点.
关键词: 非对称二氨基丁炔, 脱羧偶联, A³-偶联, 交叉偶联, 铜催化
A highly selective and efficient copper-catalyzed sequential approach for the one-pot two-step synthesis of unsymmetrical 1,4-diamino-2-butynes from propiolic acid, secondary alkylamine, aldehyde and formaldehyde solution has been developed. The process of this reaction was involved in the generation of key intermediate propargylamines which were obtained via decarboxylative A³-coupling reaction. After that, the intermediate propargylamines would react with in situ formed iminium ions to give the cross-coupling target products in moderate to excellent yields under microwave irradiation.
Key words: unsymmetrical diaminobutynes, decarboxylative coupling, A³-coupling, cross-coupling, copper-catalyzed


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