FORFARANDE FOR FRAMSTELLNING AV 4-OXO-HEXAHYDRO-PYRAZINO(2,1-A)ISOKINOLINDERIVAT

摘要

4-OXO-HEXAHYDRO-PYRAZINOISOQUINOLINE DERIVATIVES ARE OBTAINED IN GOOD YIELD BY A SINGLE-STEP PROCESS WHICH COMPRISES HYDROLYZING A 2-ACYL-4-OXO-1,2,3,6,7,11B-HEXAHYDRO-4H-pyrazino[2,1-a]isoquinoline with an oxygen-containing acid or acid salt of inorganic pentavalent phosphorus or hexavalent sulfur.