10.1021/acs.orglett.6b03330.s001 Xuwen Ren Xuwen Ren Guangxun Li Guangxun Li Jin Huang Jin Huang Weidong Wang Weidong Wang Yongpo Zhang Yongpo Zhang Guomin Xing Guomin Xing Chunyan Gao Chunyan Gao Gang Zhao Gang Zhao Jinzhong Zhao Jinzhong Zhao Zhuo Tang Zhuo Tang Step-Controlled Povarov-Type Reaction with 1,2-Dihydroquinolines as Precursors of Dienophiles: Direct Synthesis of Spirocyclic Bi-tetrahydroquinolines and Functionalized 1,2-Dihydroquinolines American Chemical Society 2016 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 12:19:26 Journal contribution 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 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.