Process for the preparation of 5,6-dihydro-1H,4H-1,2,5thiadiazolo4,3,2-ijquinoline 2,2-dioxide and intermediates

摘要

Process for the preparation of 5,6-dihydro-1H,4H-[1,2,5]thiadiazolo[4,3,2-ij]quinoline 2,2-dioxide, characterised in that a) 8-aminoquinoline is condensed with a derivative of formula: IMAGE b) the derivative of formula: IMAGE obtained in a) is hydrogenated, and c) the derivative of formula: IMAGE obtained in b) is cyclised. o