powerful method for the establishment of aza-aromatic cycles. We report herein the development of a simple and practical [3 + 3] aldol cyclization–aromatization of β,γ-dioxobutanoate with amines for the synthesis of p-aminophenols. Reactions with primary, secondary, benzyl and aryl amines all proceeded smoothly under mild reaction conditions, without catalysts and additives. Sensitive functionalities and
烯胺的环化-芳构化是建立氮杂芳环的有效方法。我们在此报告了一种简单实用的 [3 + 3] 羟醛环化 - β,γ-二氧代
丁酸酯与胺的芳构化反应,用于合成
对氨基苯酚。与
伯胺、仲胺、
苄胺和芳胺的反应均在温和的反应条件下顺利进行,无需催化剂和添加剂。敏感的官能团和
杂环化合物,如醇、醚、卤素、
羧酸、
炔烃、
吡啶、
咪唑和游离 (N-H)
吲哚,可能会干扰
金属或酸介导的过程,具有良好的耐受性。结构复杂的药物分子的后期环化-芳构化证明了该方法的高度相容性和实用性。