Synthesis of some phenylazonaphthols in an ionic liquid

A green alternative to synthetize azo compounds

“…Para red, 1 [36]. The NH in the HNMR data correspond to the hydrazone isomer [39,40] In all azo compounds obtained, the IR spectra show a signal at 1630e1575 cm À1 corresponding at N]N stretching.…”

Solvent effects in esterification of phthalic anhydride on sulfated titania-based solid acid

“…Second, that they might provide improved reactivities in a number of chemical processes (31,32). Third, the fact that a wide range of cations and anions can be employed giving chemists the potential to design the solvent with specific properties that make the description of ionic liquids as "designer solvents" very appropriate (33,34). Furthermore, they readily dissolve many organic, inorganic and organometallic compounds.…”

Acidic ionic liquid supported on silica-coated magnetite nanoparticles as a green catalyst for one-pot diazotization–halogenation of the aromatic amines

“…These advantages led to the use of ionic liquids in the synthesis of azo dyes. [37][38][39] In this sense, Brønsted acidic ionic liquids are important class of ionic liquids and form by the transfer of a proton between a Brønsted acid and a Brønsted bases. The key property of these ionic liquids is their Brønsted acidity, and much research has been conducted into this.…”