反应详情

温度

60 °C

A suspension of 10-oxo-10,11-dihydro-dibenzo[b,f]azepine-5-carboxylic acid methyl ester (15 g, 56 mmol) in methanol (75 ml) is heated to 60° C. and a catalytic amount of p-toluene sulfonic acid (0.213 g, 1.1 mmol) is added. After addition of trimethyl ortho-formate (6.25 g, 58.9 mmol) the solution is stirred at 60–70° C. for 4 hours. During this reaction the product precipitates as white crystals. The mixture is cooled to room temperature, filtered and dried to yield 15.5 g of pure title compound (98%).

1. customDuring this reaction the product
2. customprecipitates as white crystals
3. temperatureThe mixture is cooled to room temperature
4. filtrationfiltered
5. customdried