反应详情

A solution of 5 g of 1-methyl-1H-indol-4-amine [prepared according to Ley (J. Chem. Soc. Chem. Com. (1982) p. 1356], 4.7 g of salicyclic acid and 7 g of dicyclohexylcarbodiimide in 80 ml of tetrahydrofuran was refluxed for 24 hours and 20% of salicylic acid and of dicyclohexylcarbodiimide were added after 5 hours of refluxing. The mixture was filtered and the filtrate was evaporated under reduced pressure. The residue was purified by chromatography over silica (eluant:methylene chloride) to obtain 5.5 g of 2-hydroxy-N-(1-methyl-1H-indol-4-yl)benzamide melting at 211° C.

1. temperatureof refluxing
2. filtrationThe mixture was filtered
3. customthe filtrate was evaporated under reduced pressure
4. customThe residue was purified by chromatography over silica (eluant:methylene chloride)