10.1021/acs.orglett.6b01112.s018 Zhan-Da Fu Zhan-Da Fu Qing-Hui Guo Qing-Hui Guo Liang Zhao Liang Zhao De-Xian Wang De-Xian Wang Mei-Xiang Wang Mei-Xiang Wang Synthesis and Structure of Corona[6](het)arenes Containing Mixed Bridge Units American Chemical Society 2016 Macrocyclic ring transformations sulfone linkages tetrazine moieties corona substitution reaction sulfide oxidation reaction 2016-05-16 18:09:31 Dataset https://acs.figshare.com/articles/dataset/Synthesis_and_Structure_of_Corona_6_het_arenes_Containing_Mixed_Bridge_Units/3382570 A one-pot nucleophilic aromatic substitution reaction of 3,6-dichlorotetrazine with various diphenols and dibenzenethiols produced corona[4]­arene[2]­tetrazines that contain mixed oxygen, sulfide, methylene, and sulfone linkages. Macrocyclic ring transformations employing an inverse-electron-demand Diels–Alder reaction of tetrazine moieties with enamines and the subsequent sulfide oxidation reaction afforded diverse corona[4]­arene[2]­pyridazines. The acquired corona[6]­arenes adopted three types of conformational structures in the crystalline state.