With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.69604-00-8,Ethyl 5-nitrobenzofuran-2-carboxylate,as a common compound, the synthetic route is as follows.
69604-00-8, Ethyl 2-nitrobenzofuran-2-carboxylate (23.5 g) prepared according to Example 4 was added to a reaction flask, 200 ml of ethanol was added, 3 g of 5% palladium carbon was added, and the mixture was replaced with hydrogen 3 times.The hydrogen pressure was controlled to be 0.4-0.5 MPa, hydrogenation reaction was performed at 30 C. for 3 hours, the reaction was completed, and the reaction was filtered. The filtrate was concentrated under reduced pressure to dryness to obtain 19.5 g of 5-aminobenzofuran-2-carboxylic acid ethyl ester.Yield 95.1%, purity 98.8%.
69604-00-8 Ethyl 5-nitrobenzofuran-2-carboxylate 1382954, abenzofuran compound, is more and more widely used in various fields.
Reference£º
Patent; Lianyungang Hengyun Pharmaceutical Co., Ltd.; Dong Shuqiu; Feng Ruimao; Zhang Qingjie; (8 pag.)CN107540646; (2018); A;,
Benzofuran – Wikipedia
Benzofuran | C8H6O – PubChem