反应详情

To a solution of tert-butyl 1-tosyl-2,3,4,5-tetrahydro-1H-benzo[b]azepin-4-ylcarbamate (0.6 g, 1.4 mmol) in methanol (33 mL) was added magnesium metal turnings (0.51 g, 0.021 mol). The reaction mixture was stirred for 4 hours at room temperature before being evaporated to dryness and diluted with dichloromethane. The suspension formed was filtered through celite and the filtrate washed with brine. The organic layer was dried over anhydrous sodium sulfate concentrated under vacuo to give a residue which was purified by silica gel column chromatography eluting with (0-10% ethyl acetate in hexanes) to afford tert-butyl 2,3,4,5-tetrahydro-1H-benzo[b]azepin-4-ylcarbamate (0.3 g). 1H NMR: (400 MHz, CDCl3) δ: 7.18-7.08 (m, 2H), 6.92 (t, 1H), 6.84 (d, 1H), 4.52 (bs, 1H), 3.92 (m, 1H), 3.78 (bs, 1H), 3.14-2.98 (m, 2H), 3.88-3.78 (m, 1H), 2.06-2.0 (m, 1H), 1.96-1.88 (m, 1H), 1.6 (bs, 1H), 1.42 (s, 9H).

1. custombefore being evaporated to dryness
2. additiondiluted with dichloromethane
3. customThe suspension formed
4. filtrationwas filtered through celite
5. washthe filtrate washed with brine
6. dry with materialThe organic layer was dried over anhydrous sodium sulfate
7. concentrationconcentrated under vacuo
8. customto give a residue which
9. customwas purified by silica gel column chromatography
10. washeluting with (0-10% ethyl acetate in hexanes)