Synthesis of New Substituted N-Sulfonyl Pyrrolidine-2,5-Dione Using Dawson-Type Heteropolyacid as Catalyst

An efficient green synthesis of new benzothiazoles containing sulfonamide or cyclic imide moieties

“…Similar structures to compound ( 3a ) have been already obtained in our previous works, but compound ( 4a ) is never mentioned in the literature.…”

“…Prompted by the aforementioned biological and pharmaceutical activities of benzothiazole derivatives, and as a part of an ongoing program aiming at the synthesis of new heterocyclic compounds . We describe herein an efficient procedure for the synthesis of a novel series of new benzothiazole derivatives, using ultrasound irradiation in the presence of Cesium salt of Wells‐Dawson heteropolyacid (Cs 5 HP 2 W 18 O 62 ) as catalyst.…”

Practical one‐pot, two‐step protocol for the ultrasound‐assisted synthesis of new mono‐ and bis‐pyrrolidine‐2,5‐diones containing sulfonamide moiety

“…In the last part of this work, other new succinimides bearing cyclic imide fragment were synthesized by using the obtained succinimides 7a and 7b (Scheme ) as precursors. Herein, these latter were condensed with cyclic anhydrides in the presence of H 6 P 2 W 18 O 62 as catalyst, following the previously described methodology …”

“…Prompted by the aforementioned biological and pharmaceutical activities of pyrrolidine‐2,5‐dione (succinimide) derivatives, and as a part of an ongoing program aiming at the synthesis of new heterocyclic compounds, we describe herein an efficient and simple procedure for the synthesis of a novel series of mono‐ and bis‐pyrrolidine‐2,5‐dione derivatives (succinimides) containing sulfonamide moiety, with an alkyl spacer existing between these two functional motifs via a one‐pot reaction under ultrasound irradiation.…”