反应详情

A mixture of methyl 3-[(9-chloro-4-methyl-5-oxo-2,3,4,5-tetrahydro-1,4-benzoxazepin-8-yl)oxy]-5-[(phenylmethyl)oxy]benzoate (8.8 g, 18.8 mmol), and ammonium formate (11.87 g, 188 mmol) in methanol (190 mL) was placed under an atmosphere of argon and 10% palladium on charcoal (880 mg) added. The mixture was heated under relux for 2 hours, cooled to RT, filtered through Celite®, washed with methanol, and the filtrates evaporated in vacuo to a residue which was partitioned between water (150 mL) and ethyl acetate (200 mL). The organic layer was washed with brine, dried (MgSO4), evaporated in vacuo to a residue which was chromatographed on basic alumina, eluting with ethyl acetate then methanol, to give a solid which was crystallised from ethyl acetate and isohexane to give the desired compound (3.25 g). 1H NMR δ (CDCl3): 3.15 (s, 3H), 3.5 (t, 2H), 4.35 (t, 2H), 6.6 (dd, 1H), 6.75 (dt, 1H), 7.8 (t, 1H); m/z 344 (M+H)+

1. temperatureThe mixture was heated under relux for 2 hours
2. filtrationfiltered through Celite®
3. washwashed with methanol
4. customthe filtrates evaporated in vacuo to a residue which
5. customwas partitioned between water (150 mL) and ethyl acetate (200 mL)
6. washThe organic layer was washed with brine
7. dry with materialdried (MgSO4)
8. customevaporated in vacuo to a residue which
9. customwas chromatographed on basic alumina
10. washeluting with ethyl acetate
11. custommethanol, to give a solid which
12. customwas crystallised from ethyl acetate and isohexane