(3S,4S)-6-acetyl-4-{[(tert-butoxy)carbonyl]amino}-2,2-dimethyl-3,4-dihydro-2H-1-benzopyran-3-yl 3-chloro-4-fluorobenzoate 、
盐酸 以
二氯甲烷 、
1,4-二氧六环 为溶剂,
反应 21.0h,
以to give the title compound (174 mg, 25.5%) as an off white solid的产率得到(3S,4S)-6-acetyl-4-amino-2,2-dimethyl-3,4-dihydro-2H-1-benzopyran-3-yl 3-chloro-4-fluorobenzoate hydrochloride