(4R,5R)-3-propionyl-2,2-dimethyl-4-hydroxymethyl-5-[4-(methylsulfonyl)phenyl]-1,3-oxazolidine 、
N,N-二乙基-1,1,2,3,3,3-六氟丙胺 在
sodium hydroxide 、
水 、
二氯甲烷 、
(4S,5R)-3-propionyl-2,2-dimethyl-4-fluoromethyl-5-[4-(methylsulfonyl)phenyl]-1,3-oxazolidine 作用下,
以
二氯甲烷 为溶剂,
反应 4.0h,
以gives a solution of (4S,5R)-3-propionyl-2,2-dimethyl-4-fluoromethyl-5-[4-(methylsulfonyl)phenyl]-1,3-oxazolidine (Compound IX: R1 is methylsulfonyl, R2 and R3 are methyl and R4 is ethyl) for use in the next step的产率得到(4S,5R)-3-propionyl-2,2-dimethyl-4-fluoromethyl-5-[4-(methylsulfonyl)phenyl]-1,3-oxazolidine