Synthesis of 1,8‐Naphthyridine Derivatives: Potential Antihypertensive Agents. Part 7.

Reaction of substituted 7-chloro-1,8-naphthyridines with N-carbethoxypiperazine gave in good yields the corresponding 7-(4-carbethoxypiperazin-1-yl)-1,8-naphthyridines V as potential antihypertensive agents.