The present invention relates to a process for the preparation of compounds of formula (I), wherein the substituents are as defined in claim
1,
by reacting a compound of formula (II), either with a chlorination or bromination agent or with a compound of formula (III) CI-SO
2
R
9
, R
9
being C
1
-C
4
alkyl, C
1
-C
4
haloalkyl, phenyl or C
1
-C
4
alkyl-substituted phenyl, to form the compound of formula (IV), reacting the compound of formula (IV) with a compound of formula (V) M
+
—O
−
—C(O)—Y wherein Y is as defined above and M
+
is the hydrogen cation or an alkali metal ion, alkaline earth metal ion or ammonium ion, to form the compound of formula (VI) and treating that compound with a cyanide source in the presence of a base.
本发明涉及一种制备式(I)化合物的方法,其中取代基如权利要求1所定义,通过将式(II)化合物与
氯化剂或
溴化剂或式(III)化合物CI-SO2R9反应,其中R9为C1-C4烷基、C1-C4卤代烷基、苯基或C1-C4烷基取代的苯基,以形成式(IV)化合物,将式(IV)化合物与式(V)化合物M+—O−—C(O)—Y反应,其中Y如上所定义,M+为氢阳离子或碱
金属离子、碱土
金属离子或
铵离子,以形成式(VI)化合物,并在碱的存在下处理该化合物与
氰源。