Novel sultone based Brønsted acidic ionic liquids with perchlorate counter-anion for one-pot synthesis of 2H‑indazolo [2, 1‑b] phthalazine‑triones
F Arian, M Keshavarz, H Sanaeishoar… - Journal of Molecular …, 2021 - Elsevier
Three novel sultone based Brønsted acidic ionic liquids are introduced. These ionic liquids
were prepared in three similar two-steps reactions. The ring opening of 1, 4-butane sultone
was performed using 1, 4-dimethyl piperazine or 1, 10-phenantroline as nitrogen
nucleophile sources to obtain zwitterions and then followed by acidification by treatment with
perchloric acid to give the introduced ionic liquids. FTIR, 1 HNMR, 13 C-NMR, TGA and
CHNS analysis techniques were used for the characterization of these ionic liquids. These …
were prepared in three similar two-steps reactions. The ring opening of 1, 4-butane sultone
was performed using 1, 4-dimethyl piperazine or 1, 10-phenantroline as nitrogen
nucleophile sources to obtain zwitterions and then followed by acidification by treatment with
perchloric acid to give the introduced ionic liquids. FTIR, 1 HNMR, 13 C-NMR, TGA and
CHNS analysis techniques were used for the characterization of these ionic liquids. These …
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