Mechanistic understanding of domino cyclization between gem-dialkylthio vinylallenes and benzylamine towards economic synthesis: a computational study
作者:Haiyan Yuan、Yiying Zheng、Zhongxue Fang、Xihe Bi、Jingping Zhang
DOI:10.1039/c3gc42259c
日期:——
DFT investigations are carried out to improve the domino cyclization between gem-dialkylthio vinylallenes and benzylamine. Economic reaction approaches were explored, namely, this reaction can occur under organic solvent-free conditions either catalyzed by trace water or self-catalyzed by BnNH2. Three types of reactions (DMSO-assisted, trace water-catalyzed, and self-catalyzed by BnNH2) shared the
进行了DFT研究,以改善宝石-二烷硫基乙烯基亚丙基和苄胺之间的多米诺环化。探索了经济的反应方法,即该反应可以在痕量水催化或BnNH 2自催化的无有机溶剂条件下进行。三种类型的反应(DMSO辅助,痕量水催化和BnNH 2自身催化)具有相同的反应机理,其中BnNH 2对硫代酰胺中间体Re的烯丙基碳具有亲核攻击作用。对于痕量水催化反应,还发现了另一种机制,即BnNH 2攻击Re的构象异构体的羰基碳。在研究的机理中,痕量水催化的机理被认为是最有效,最方便的吡咯合成方法。实验观察进一步证实了我们的计算结果,这为吡咯的合成开辟了新的策略。