Facile Construction of Hydantoin Scaffolds via a Post-Ugi Cascade Reaction
作者:Chuan Xu、Zhong-Zhu Chen、Zhi-Gang Xu、Yong Ding、Jiang-Ping Meng、Dian-Yong Tang、Yong Li、Jie Lei
DOI:10.1055/s-0037-1610234
日期:2018.10
A small series of hydantoins was efficiently synthesized via a two-step Ugi/cyclization reaction sequence using alkyne group as a leaving group under basic conditions. This microwave-assisted one-pot cyclization strategy could be applicable to other multicomponent reactions (MCRs) for synthesizing bioactive and drug-like hydantoins.
This study reports a mild reaction-condition approach for the direct C−C bond cleavage of amides to form hydantoin structures in the presence of 4-methylpyridine and a base. This approach presents an amide C−C bond cleavage strategy enabling nucleophilic addition to the amide carbonyl involving a reactive spiro intermediate. A broad spectrum of pseudo peptide Ugi adducts as bifunctional starting materials
本研究报告了一种温和的反应条件方法,可在 4-甲基吡啶和碱存在的情况下直接裂解酰胺的 C−C 键,形成乙内酰脲结构。该方法提出了一种酰胺 C−C 键断裂策略,能够在涉及反应性螺环中间体的酰胺羰基上进行亲核加成。合成了作为双功能起始材料的广谱假肽 Ugi 加合物并用于该转化。通过实验和理论研究对该反应的机理途径进行了研究。