Immobilized sulfonic acid functionalized ionic liquid on magnetic cellulose as a novel catalyst for the synthesis of triazolo[4,3-a]pyrimidines

Ionic liquid immobilized on modified magnetic FSM-16: an efficient and magnetically recoverable nanocatalyst

“…2b). 54,56,57 As shown in Fig. 2c, the XRD pattern of Fe 3 O 4 @FSM-16 is in good agreement with the XRD pattern of previous reports of Fe 3 O 4 coated FSM-16 structures (Fe 3 O 4 @FSM-16).…”

“…1a, the absorption bands revealed at 574 and 3400 cm −1 are attributed to Fe–O and O–H bonds, respectively. 54,56 Also, in Fig. 1b, the peaks at 474, 806, and 1106 cm −1 correspond to asymmetric and symmetric stretching vibrations of the Si–O–Si group.…”

“…Polyhydroquinoline derivatives are usually synthesized via the four-compound one-pot reaction of aldehyde, dimedone, ethyl acetoacetate, ammonium acetate, and the corresponding catalyst. [49][50][51] In continuation of our studies program for the synthesis of novel heterogeneous nanocatalysts and also considering the importance of mesoporous materials in the catalysis synthesis process, 12,[52][53][54][55][56][57][58] herein, a recyclable magnetic catalyst based on FSM-16 (Fe 3 O 4 @FSM-16-SO 3 /IL) has been synthesized and characterized. Furthermore, Fe 3 O 4 @FSM-16-SO 3 /IL was used as an effective catalyst in the synthesis of polyhydroquinoline derivatives via the one-pot reaction of various aromatic aldehydes, dimedone, ethyl acetoacetate, and ammonium acetate.…”

The Synthesis of Nitrogen- and Oxygen-Containing Heterocyclic Scaffolds Assisted by Ionic Liquids: A 2022 Literature Survey

“…Scheme 33 Synthesis of 5-substituted 1H-tetrazoles 107 using an imidazolium-based IL Jahanbakshi and Farahi synthesized a novel, quasi-homogenous, Brønsted acidic and reusable IL, 1-(propyl-3sulfonate) vinyl imidazolium hydrogen sulfate from 1,4-butane sultone and 1-vinyl imidazole, supported on modified magnetic cellulose. 94 The catalytic activity of this IL was explored for the synthesis of triazolo[4,3-a]pyrimidines 111 from various aromatic aldehydes 1, nitriles 109, and 3amine-1H-1,2,4-triazole (110) (Scheme 34).…”

“…Jahanbakshi and Farahi synthesized a novel, quasi-homogenous, Brønsted acidic and reusable ILs, 1-(propyl-3-sulfonate) vinyl imidazolium hydrogen sulfate from 1,4butanesultone and 1-vinyl imidazole, supported on modified magnetic cellulose. 93 The catalytic activity of these ILs was explored for the synthesis of triazolo[4,3-a]pyrimidines (111) from various aromatic aldehydes (1), nitriles (109), and 3-amine-1H-1,2,4-triazole (110,Scheme 34). Jaccob and co-workers reported the catalytic cycloaddition of CO 2 to form cyclic carbonates (13, Scheme 47).…”