Choline chloride/CuCl as an effective homogeneous catalyst for palladium-free Sonogashira cross-coupling reactions

Recent advances in the application of deep eutectic solvents as sustainable media as well as catalysts in organic reactions

“…The one-pot reaction of various aromatic aldehydes, ketones, aliphatic amines, and carbon disulfide, in the presence of potassium hydroxide in ChCl/urea at room temperature, led to the corresponding dithiocarbamates (138) in good to excellent yields (Scheme 51). The one-pot reaction of various aromatic aldehydes, ketones, aliphatic amines, and carbon disulfide, in the presence of potassium hydroxide in ChCl/urea at room temperature, led to the corresponding dithiocarbamates (138) in good to excellent yields (Scheme 51).…”

Deep eutectic solvent-catalyzed arylation of benzoxazoles with aromatic aldehydes

“…40 Besides, DESs have been known as preferable alternative solvents/catalysts for organic synthesis due to their non-hazardous, non-toxic, stable, non-ammable, and inexpensive nature. [41][42][43][44][45][46][47][48][49] Recently, we have reported DESs-catalyzed organic transformations such as Friedel-Cras acylation and esterication of sterically hindered alcohols. 50,51 As our ongoing efforts to develop environmentally benign syntheses, it is the aim of this communication to describe our preliminary results in the arylation of benzoxazoles with aromatic aldehyde using DES as a green catalyst.…”

Zinc (II) chloride-based deep eutectic solvents for application as electrolytes: Preparation and characterization

“…Add to this, ChCl:CuCl DESs became attractive homogeneous catalysts in view of their ease of applications and low costs in the palladium-free Sonogashira-type cross-coupling reactions. The use of this catalyst led to the formation of substituted aromatic alkynes in excellent yields about 97% under palladium-free conditions [17]. Besides, the electrochemical screening of both ammonium and phosphonium-based DESs on the potential applications of redox flow batteries was conducted.…”

“…It was observed that DESs synthesized from ammonium salts provided a larger potential window in comparison to the phosphonium-based counterparts [18]. In addition, ChCl-based DESs were utilized by different groups as an electrolyte in lithium ion batteries, electric double layer capacitors, and as electrolytic media in electropolishing of metals [17][18][19][20].…”