The present invention relates to a process for the preparation of compounds of formula I
1
wherein the substituents are as defined in claim 1, by conversion of a compound of formula II
2
reaction of that compound with a compound of formula IV
X—C(O)—Q (IV)
wherein X is a leaving group, to form a compound of formula V
3
and treatment of that compound in the presence of a base with catalytic amounts of cyanide ions.
本发明涉及一种制备式I1化合物的方法,其中取代基如权利要求1所定义的那样,通过将式II2化合物转化为式IVX—C(O)—Q (IV)化合物,然后与式IV反应,其中X是一个离去基团,以形成式V3化合物,并在碱的存在下,在催化量的
氰离子作用下处理该化合物。