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  • Cyclization Reaction of Don...
    Wang, Jing; Zhang, Qi-Ying; Xie, Ming-Sheng; Wang, Dong-Chao; Qu, Gui-Rong; Guo, Hai-Ming

    Organic letters, 10/2018, Letnik: 20, Številka: 20
    Journal Article

    An unprecedented cyclization reaction of donor–acceptor oxiranes with N,N′-disubstituted thioureas to construct trans-dihydropyrimidines is presented. Preliminary reaction mechanism studies demonstrated that the reaction underwent sequential cycloaddition/amine ester exchange/oxygen–sulfur exchange/desulfuration/Michael addition process. A wide range of trans-dihydropyrimidines were produced with high yields up to 94% by using this method.