反应详情

TFA (10 mL) was added to a solution of 53B (2.35 g) in CH2Cl2 (20 mL) at 0° C. and stirred for 4 h. The reaction mixture was concentrated to yield 53C (1.95 g, 99%) as an off-white solid. MS (ESI) m/z 267.2/269.2 (M−H)−.

1. concentrationThe reaction mixture was concentrated