反应详情

To methyl 4-(3-amino-6-(4-((tert-butoxycarbonyl)amino)cyclohexyl)pyrazin-2-yl)-2-fluorobenzoate (230 mg, 0.517 mmol) was added MeOH (2 mL), THF (2 mL) and then lithium hydroxide 1M aqueous solution (1.552 mL, 1.552 mmol). The reaction was stirred at room temperature for 1 h. The solvent was concentrated to residue, then THF (20 mL) was added and concentrated to residue. Then THF (20 mL) was added again and re-concentrated to residue to constant mass to give the desired product (which is 2:1 trans to cis ratio), used as is. Assume quantitative yield (0.517 mmol). LCMS (m/z): 431.2 (MH+), 0.78 min for both.

1. concentrationThe solvent was concentrated to residue
2. additionTHF (20 mL) was added
3. concentrationconcentrated to residue
4. additionThen THF (20 mL) was added again
5. concentrationre-concentrated to residue to constant mass