反应详情

A solution of benzyl 3-(2-Dipropylcarbamoylmethoxycarbonyl-ethylsulfamoyl)-benzoic acid benzyl ester (5 g, 33.25 mmol) in isopropyl acetate (82 ml) was treated with 10% Pd/C (0.84 g, 50% wet), and stirred under H2 (3 atm) overnight. The catalyst was removed by filtration. To the filtrate was added 10% Pd/C (1.68 g, 50% wet), and the reaction stirred under H2 (3 atm) for 18 h. The catalyst was removed by filtration and further 10% Pd/C (1.68 g, 50% wet) was added and the reaction stirred under H2 (1 atm) for 18 h. The catalyst was removed by filtration and washed with isopropyl acetate (20 ml). The combined filtrates were concentrated in vacuo and heptane was added to the solution and stirred at RT for 2 hr then −2° C. for 4 h. The solid which formed was collected by filtration and dried under vacuum at 40° C. to afford the title compound; LC-MS; 415.1 [M+H]+, Method (i).

1. customThe catalyst was removed by filtration
2. additionTo the filtrate was added 10% Pd/C (1.68 g, 50% wet)
3. stirringthe reaction stirred under H2 (3 atm) for 18 h
4. customThe catalyst was removed by filtration and further 10% Pd/C (1.68 g, 50% wet)
5. additionwas added
6. stirringthe reaction stirred under H2 (1 atm) for 18 h
7. customThe catalyst was removed by filtration
8. washwashed with isopropyl acetate (20 ml)
9. concentrationThe combined filtrates were concentrated in vacuo and heptane
10. additionwas added to the solution
11. stirringstirred at RT for 2 hr
12. wait−2° C. for 4 h
13. customThe solid which formed
14. filtrationwas collected by filtration
15. customdried under vacuum at 40° C.