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Beilstein J. Org. Chem. 2025, 21, 2220–2233, doi:10.3762/bjoc.21.169
Graphical Abstract
Figure 1: Phthalazinones 1, benzothiadiazine dioxides 2, and thiadiazinoindole dioxides 3.
Scheme 1: Synthesis of tri- and tetracyclic thiadiazinoindole dioxides 3.
Figure 2: 1H NMR and selective 1D NOESY (with the excitation of NH) spectra of (E)-7h.
Figure 3: 1H NMR and selective 1D NOESY (with the excitation of NH) spectra of (Z)-7h.
Scheme 2: Synthesis of pentacyclic compounds 10.
Figure 4: X-ray structures of compounds 3d (A), 7d (B), (Z)-7h (C), and (E)-9a (D).
Figure 5: The capacity factor (logk) vs calculated partition coefficients (clogP) by ACD Labs/Percepta [36]); the...