Bicyclic heteroaromatic compounds as protein tyrosine kinase inhibitors

摘要

A process for the preparation of a compound of formula (I) comprising the steps: (a) reacting a compound of formula (II) wherein L and L' are suitable leaving groups, with a compound of formula (III) UNH2(III) to prepare a compound of formula (IV) and subsequently (b) substituting the group R1 by replacement of the leaving group L'.