反应详情

Steps N2 and N3. A mixture of 3-chloro-5-(methoxycarbonyl)benzoic acid (2 g, 9.3 mmol) and thionyl chloride (8 mL) was refluxed for 2 hours. After the excess thionyl chloride was removed under vacuum, the residue was treated with a 0.5M solution of ammonia in 1,4-dioxane (40 mL, 20 mmol) overnight. The solvent was removed under vacuum and methyl 3-carbamoyl-5-chlorobenzoate was obtained as a white solid.

1. temperaturewas refluxed for 2 hours
2. customAfter the excess thionyl chloride was removed under vacuum
3. customThe solvent was removed under vacuum