A process for the preparation of a compound of formula (A)' or (A)'':
which process comprises the base treatment of a quaternary ammonium salt of a compound of formula (D):
wherein the NH₂ and OH moieties are trans and are (R,S) or (S,R), respectively.
一种制备式(A)'或(A)''化合物的工艺:
该工艺包括对式(D)化合物的季
铵盐进行碱处理:
其中 NH₂和 OH 分子为反式,分别为 (R,S) 或 (S,R)。