[(EtO)3Si(CH2)3NH3+][CH3COO−] as a novel basic ionic liquid catalyzed green synthesis of new 2-(phenylsulfonyl)-1H-benzo[a]pyrano[2,3-c]phenazin-3-amine derivatives

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

“…Shaterian and Shirzaei reported the solvent-free synthesis of 2-(phenylsulfonyl)-1H-benzo[a]pyrano[2,3-c]phenazin-3-amine derivatives 26 from 2-hydroxynaphthalene-1,4-dione (23), o-phenylenediamine (24), aromatic aldehydes 1, and (phenylsulfonyl)acetonitrile (25) catalyzed by the acetate-based ammonium IL [(EtO) 3 Si(CH 2 ) 3 NH 3 + ][CH 3 COO -] at 100 °C (Scheme 6). 63 The basic IL was obtained using neat APTES ((3-aminopropyl)triethoxysilane) and acetic acid, which was added dropwise and the obtained mixture was then stirred for 24 hours at room temperature. The structure of the IL was confirmed by the presence of a broad band due to the ammonium and carboxylate functional groups at 3500-2400cm -1 in the FT-IR, along with 1 H and Lei and colleagues synthesized pyridinamide-functionalized ionic liquids (PAILs) such as N,N-dimethyl-N-(2-oxo-2-(pyridin-2-ylamino)ethyl)butan-1-aminium iodide (Scheme 7) 64 for the carbonylative cycloaddition of epoxides 27a to prepare cyclic carbonates 27b at 60 °C with more than 99% selectivity.…”

“…). 62 The basic ILs were obtained using neat APTES ((3-aminopropyl)triethoxysilane) and acetic acid which was added dropwise and stirred for 24 h at rt, which were confirmed by a broad band of ammonium and carboxylate functional group at 3500-2400cm -1 using FT-IR, and along with 1 Hand 13 This article is protected by copyright. All rights reserved.…”

[(EtO) 3 Si(CH 2 ) 3 N + H 3 ][CH 3 COO - ] as basic ionic liquid catalyst promoted green synthesis of benzo[a]pyrano[2,3-c]phenazine derivatives

“…According to the literature catalyst [22], APTES ((3-aminopropyl) triethoxy silane) (10 mmol) was placed in a two necked ask equipped with a re ux condenser and a dropping funnel. The ask was placed in an ice bath.…”

“…In continuation of our research on the synthesis and applications of homogenous and heterogeneous catalysts in organic chemistry [22] [23], here, we use the [(EtO) 3 Si(CH 2 ) 3 N + H 3 ][CH 3 COO − ] as basic ionic liquid, and reusable catalyst for the one-pot synthesis of benzo[a]pyrano [2,3-c]phenazine derivatives by four-component condensation of 2-hydroxynaphthalene-1,4-dione, benzene-1,2-diamine, malononitrile and arylaldehydes at 90°C under solvent-free conditions (Scheme 1).…”

[(EtO) 3 Si(CH 2 ) 3 NH 3 + ][CH 3 COO - ] functionalized on magnetic silica: a novel magnetically recyclable nanocatalyst for synthesis of new (phenylsulfonyl)dihydropyrido[2,3-d]pyrimidine derivatives

“…Literature survey showed us that the synthesis of these compounds have disadvantages such as: low e ciency, long reaction time, separation and use of toxic and expensive catalysts [30,31]. Thus, in continuation of our research on ionic liquids, immobilization of organic catalysts on nanomagnetic particles, and their applications in organic synthesis [32], herein, we report preparation of 2. The Fe-O vibration at 586 cm − 1 con rms the formation of Fe 3 O 4 nanoparticles (Fig.…”