One pot synthesis of 2-phenylbenzoxazoles by potassium cyanide assisted reaction of o-aminophenols and benzaldehydes

A 4-(1H-Benzo[d]oxazole-2-yl)-2-methoxyphenol as Dual Selective Sensor for Cyanide Ion Detection

“…All the solvents and materials obtained commercially (Merck) in this work were of analytical purity grade quality and used without further purification. The anions were added in the form of sodium cyanide, sodium flouride, sodium iodide, sodium dihydrogenphosphate and sodium bromide Synthesis: The synthetic procedure for S3 molecule is adopted from Reyes et al method [7] with some modifications. Vanillin (1.6 g), 2-aminophenol (1.1 g) and alumina (0.75 g) in 25 mL acetonitryl were stirred at room temperature for 5 h. The progres of the reaction was checked with TLC, then the mixture was poured into 300 mL cold distilled water and left the solution at room temperature for 24 h. The precipitate formed was recrystallized with methanol and then characterized (Scheme-I).…”

A mild convenient ultrasound assisted synthesis of 2-aryl benzoxazoles catalyzed by KCN/MWCNT as an efficient heterogeneous nanocatalyst

“…Comparison of the results of ultrasound irradiation with conventional conditions indicated that, the reaction of various aromatic aldehydes with 2-aminophenol would be catalyzed by ultrasonic irradiation [38,39,[44][45][46][47]. Chemical reactions can be catalyzed under ultrasound irradiation through acoustic cavitation: formation, growth and collapse of bubbles [48].…”

One-pot, aqueous-phase synthesis of graphene oxide functionalized with heterocyclic groups to give increased solubility in organic solvents

“…Furthermore, another two typical peaks at 1544 and 1359 cm 21 are also observed in BO-GO, which can be assigned to the stretching of CLN and C-N, respectively. 28 In comparison to BO-GO, the peak at 1730 cm 21 has disappeared in the spectrum of BI-GO, indicating the complete functionalization of the carboxyl groups. The new peak at 1520 cm 21 is attributed to the skeletal vibration of the benzene ring.…”