反应详情

The 2-methoxy-2′-trifluoromethyl-[1,1′-biphenyl]-4-carboxaldehyde of Step B (0.95 9, 3.41 mmol) and sulfamic acid (0.43 g, 4.43 mmol) were dissolved in a mixture of tetrahydrofuran and water (1:1, v/v, 30 mL). Sodium chlorite (0.31 g, 4.43 mmol) was added under stirring, and the solution turned yellow. After 30 minutes, additional sodium chlorite and sulfamic acid were added, and the solution stirred an additional hour. The solution was then concentrated, and the residue partitioned between ethyl acetate and water. The ethyl acetate layer was dried and concentrated to yield an oil, which solidified upon trituration with hexane to provide the title compound (0.84 g) as a yellow solid, which was used in the next step.

1. stirringthe solution stirred an additional hour
2. concentrationThe solution was then concentrated
3. customthe residue partitioned between ethyl acetate and water
4. dry with materialThe ethyl acetate layer was dried
5. concentrationconcentrated
6. customto yield an oil, which