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Beilstein J. Org. Chem. 2015, 11, 2179–2188, doi:10.3762/bjoc.11.236
Graphical Abstract
Scheme 1: 1,3-Tropolones 2–4 prepared by the reaction of o-chloranil with methylene active compounds.
Scheme 2: General scheme of the synthesis of 2-(2-hetaryl)-5,6,7-trichloro-1,3-tropolones 5 and 2-(2-hetaryl)...
Scheme 3: The mechanism for the formation of 5,6,7-trichloro-1,3-tropolones 5 and 4,5,6,7-tetrachloro-1,3-tro...
Figure 1: Molecular structure of 2-(3,3-dimethylindolyl)-5,6,7-trichloro-1,3-tropolone 5g. Thermal ellipsoids...
Figure 2: Molecular structure of 2-(5-chlorobenzothiazolyl)-4,5,6,7-tetrachloro-1,3-tropolone 6e. Thermal ell...
Scheme 4: The fast prototropic N–H···O N···H–O equilibrium in solutions of 2-hetaryl-5,6,7-trichloro- and 4,...
Scheme 5: Two reaction paths for coupling 2-hetaryl-1,3-tropolones 5 and 6 with alcohols.
Figure 3: Molecular structure of 2-(3,3-dimethylindolyl)-5,7-dichloro-6-ethoxy-1,3-tropolone 13. Selected bon...
Figure 4: Molecular structure of 2-(2-ethoxycarbonyl-6-hydroxy-3,4,5-trichlorophenyl)benzoxazole 11b. Selecte...
Figure 5: Electronic absorption (1, 2), fluorescence emission (λexc = 350 nm) (3, 4) and fluorescence excitat...