反应详情

Thus 3-amino pyridine III may be condensed with a glycerol of formula IV to give the ##STR3## 1,5-naphthyridine of formula V which is reduced e.g. by hydrogenation over platinum oxide, to the 1,2,3,4-tetrahydro-1,5-naphthyridine of formula (VI). In formula IV, V and VI, R1, R2 and R3 are as defined in connection with formula I.