A process for the preparation of a compound of formula (I) is disclosed,
which comprises:
a) the reaction of a compound of formula (II)
with zinc azide of formula (III)
Zn(N
3
)
2
(III)
in the presence of a solvent of formula R
1
—OH, wherein R
1
is herein defined, to obtain a compound of formula (IV),
b) its conversion into a compound of formula (V);
c) its enantiomeric enrichment to obtain the (S) enantiomer of formula (VI); and
d) the hydrolysis thereof.
揭示了一种制备化合物(I)的方法,包括:a)将化合物(II)与化合物(III)Zn(N3)2(III)在溶剂R1—OH的存在下反应,其中R1在此处定义,以获得化合物(IV);b)将其转化为化合物(V);c)对其进行对映体富集,以获得化合物(VI)的(S)对映体;和d)对其进行
水解。