Compounds of the formula I
in which R
1
, R
2
, R
3
, R
4′
have the meanings indicated in claim
1,
are inhibitors of tyrosine kinases, in particular Met kinase, and can be employed, inter alia, for the treatment of tumours.
                            式I中R1、R2、R3、R4'的化合物具有权利要求1中指示的含义,是
酪氨酸激酶的
抑制剂,特别是Met激酶的
抑制剂,可用于治疗肿瘤。