反应详情

Ethyl 3-amino-4-cyclohexylaminobenzoate (130 g) obtained in Example 1, Step 3, and methyl 4-hydroxybenzimidate hydrochloride (139 g) were added to methyl alcohol (1500 ml), and the mixture was refluxed under heating for 4 hr. The reaction mixture was allowed to cool and the precipitated crystals were collected by filtration to give the title compound (131 g, yield 72%).

1. temperaturethe mixture was refluxed
2. temperatureunder heating for 4 hr
3. temperatureto cool
4. filtrationthe precipitated crystals were collected by filtration