Ren, Xuwen Li, Guangxun Huang, Jin Wang, Weidong Zhang, Yongpo Xing, Guomin Gao, Chunyan Zhao, Gang Zhao, Jinzhong Tang, Zhuo Step-Controlled Povarov-Type Reaction with 1,2-Dihydroquinolines as Precursors of Dienophiles: Direct Synthesis of Spirocyclic Bi-tetrahydroquinolines and Functionalized 1,2-Dihydroquinolines A novel Povarov-type reaction for straightforward synthesis of novel spiro bi-tetrahydroquinolines with readily available 1,2-DHQs (1,2-dihydroquinolines) and aromatic imines was developed. The reaction could be selectively stopped at the first stage under a Brønsted acid catalyst to afford the corresponding functionalized 1,2-DHQs conveniently. dihydroquinoline;Dienophile;Spirocyclic Bi-tetrahydroquinolines;novel spiro bi-tetrahydroquinolines;Step-Controlled Povarov-Type Reaction;functionalized;imine;synthesis;Br ønsted acid catalyst;Precursor;DHQ;Dihydroquinoline;Functionalized;Direct Synthesis;novel Povarov-type reaction 2016-12-09
    https://acs.figshare.com/articles/journal_contribution/Step-Controlled_Povarov-Type_Reaction_with_1_2-Dihydroquinolines_as_Precursors_of_Dienophiles_Direct_Synthesis_of_Spirocyclic_Bi-tetrahydroquinolines_and_Functionalized_1_2-Dihydroquinolines/4299770
10.1021/acs.orglett.6b03330.s001