With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.54903-16-1,2-Oxo-2,3-dihydrobenzo[d]oxazole-6-carboxylic acid,as a common compound, the synthetic route is as follows.
54903-16-1, General procedure: Method E: A solution of the appropriate acid 3a (0.91 g, 5.1 mmol) inchloroform (20 mL) was cooled to 0 C with stirring. Thionyl chloride(1.75 mL, 24 mmol) was added dropwise, and the reaction mixture was heated at reflux for 5 h. After evaporation, the resulting crude acid chloride was dissolved in dichloromethane (50 mL),to 4 C, and added dropwise to a cooled mixture of 2-amino-4,6-dimethylpyridine(0.51 g, 4.8 mmol) and triethylamine (0.95 mL, 6.8 mmol) in dichloromethane (50 mL). The reaction mixture was then stirred at room temperature for 18 h. After evaporation of dichloromethane under vacuum, the residue was treated with water and the resulting precipitate filtered, washed with water, dried and recrystallised from 95% ethanol. Compound (4b) was synthesised in an identical fashion to (4a).
As the paragraph descriping shows that 54903-16-1 is playing an increasingly important role.
Reference£º
Article; Messaoud, Liacha; Wassila, Yahia; Khemissi, Seddiki; Yasmina, Adjeroud; Hanane, Chabane; Journal of Chemical Research; vol. 38; 6; (2014); p. 331 – 333;,
Benzoxazole – Wikipedia
Benzoxazole | C7H5NO – PubChem