Verona Pharma plc
NEW COMPOUND AND PROCESS

Abstract:

The present invention relates to a novel nitrile derivative of a pyrimido[6,1-a]isoquinolin-4-one compound of formula (A). The invention further relates to a process for producing a compound of formula (A). The invention also relates to a process which comprises reducing a compound of formula (A). Compounds of the invention are useful in the production of compounds such as RPL554. (A) ##STR00001##