反应详情

To a solution of 3-(2-formylphenyl)benzo[d]isoxazole-6-carboxylic acid (Compound 6) (60.2 g) in N-methyl-2-pyrrolidinone (600 mL) at room temperature was added in one portion 1,1′-carbonyldiimidazole (40.2 g) and the solution stirred at room temperature under nitrogen for 2 h then poured into specific gravity 0.880 aqueous ammonia solution. The suspension was stirred mechanically at room temperature for 2 h then filtered. The still moist collected solid was triturated in methanol (200 mL) at room temperature then filtered, this material was triturated again with methanol (100 mL) then filtered and dried in vacuo to give the title product (54.92 g).

1. stirringThe suspension was stirred mechanically at room temperature for 2 h
2. filtrationthen filtered
3. customThe still moist collected solid
4. customwas triturated in methanol (200 mL) at room temperature
5. filtrationthen filtered
6. customthis material was triturated again with methanol (100 mL)
7. filtrationthen filtered
8. customdried in vacuo