反应详情

Zinc dust (21.4 g, 330 mmol) was carefully added into a solution of 4-{(2-benzyloxy-ethyl)-[4-[(5-nitro-2-phenoxy-pyridin-4-ylmethyl)-amino]-4-(S)-(tetrahydro-pyran-4-yl)-butyryl]-amino}-cis-cyclohexanecarboxylic acid benzyl ester (1.85 g, 2.4 mmol) and NH4Cl (2.6 g, 48 mmol) in MeOH (300 mL). The resulting mixture was refluxed 4 hours. The MeOH was removed before EtOAc (300 mL) was added. The resulting solution washed with aq. NaHCO3 and aq. NaCl. The organic layer was dried with MgSO4, filtered, and evaporated to yield 4-[[4-[(5-amino-2-phenoxy-pyridin-4-ylmethyl)-amino]-4-(S)-(tetrahydro-pyran-4-yl)-butyryl]-(2-benzyloxy-ethyl)-amino]-cis-cyclohexanecarboxylic acid benzyl ester as a light brown oil.

1. temperatureThe resulting mixture was refluxed 4 hours
2. customThe MeOH was removed before EtOAc (300 mL)
3. additionwas added
4. washThe resulting solution washed with aq. NaHCO3 and aq. NaCl
5. dry with materialThe organic layer was dried with MgSO4
6. filtrationfiltered
7. customevaporated