METHOD FOR PRODUCING ANNELATED PIPERAZIN-2-ONE DERIVATIVES AND INTERMEDIATES OF SAID METHOD.

摘要

The invention relates to a method for producing the annelated piperazin-2-onederivatives of general formula (I), wherein R1 to R5, A1and A2 are defined as in the claims and the description. The invention especially relates to the production of 7,8-dihydro-5H-pteridin-6-one derivatives.