Ionic liquid-promoted dehydration of aldoximes: a convenient access to aromatic, heteroaromatic and aliphatic nitriles

Emeraldine Base Form of Polyaniline Nanofibers as New, Economical, Green, and Efficient Catalyst for Synthesis of Z-Aldoximes

“…Oximes and their derivatives are important intermediates in the synthesis of amides [1][2][3][4], nitro compounds, hydroximinoyl chlorides, nitrones [5], amines, azoles, nitrile oxides, chiral -sulfinyl oximes, nitriles [6][7][8], and isoxazolines [9].…”

Green synthesis of benzonitrile using ionic liquid with multiple roles as the recycling agent

“…The results demonstrated that [HSO 3 -b-Py]$HSO 4 not only can be used as solvent to promote the benzaldehyde oximation, but also as catalyst to promote the benzaldoxime dehydration. [35][36][37] Considering that when the [HSO 3 -b-Py]$HSO 4 alone was applied as both the solvent and catalyst, the reaction liquid was too viscous to separate and recover the ionic liquid. For this reason, a mixture of paraxylene and [HSO 3 -b-Py]$HSO 4 were employed as solvent for the synthesis of benzonitrile.…”

“…Ionic liquid was reported to be the catalyst for the dehydration of benzaldehyde oxime. [35][36][37] The dehydration process could be promoted by the protonation of hydroxyl group in the benzaldehyde oxime through the H + provided by the ionic liquid, converted this moiety to a better leaving group and thus facilitated the formation of benzonitrile. 36 In order to explore the relationship between the catalytic performance and properties of the ionic liquids, which were combined in the (NH 2 -OH) 2 $ILs, their acid strengths were measured according to the method reported previously.…”

Preparation, characterization and use of 1,3-disulfonic acid imidazolium hydrogen sulfate as an efficient, halogen-free and reusable ionic liquid catalyst for the trimethylsilyl protection of hydroxyl groups and deprotection of the obtained trimethylsilanes

“…Nowadays task-specific ionic liquids (TSILs) have received considerable interest as eco-friendly solvents, catalysts and reagents in green synthesis because of their unique properties, such as low volatility, nonflammability, high thermal stability, negligible vapor pressure and ability to dissolve a wide range of materials [1][2][3][4][5][6][7][8][9]. Among them, Brönsted acidic ionic liquids have designed to replace solid acids and traditional mineral liquid acids like sulfuric acid and hydrochloric acid in chemical procedures [10][11][12][13][14].…”