反应详情

Compound 201B (44 mg, 0.18 mmol) was treated with a mixture of CH2Cl2 and TFA (1:1, 2 mL) for 30 min. The volatiles were removed under reduced pressure and the residue was azeotropically evaporated with heptane-CH2Cl2 three times to give a TFA salt of Compound 201C, which was used immediately in the next reaction without step further purification.

1. customThe volatiles were removed under reduced pressure
2. customthe residue was azeotropically evaporated with heptane-CH2Cl2 three times