Condensed Isoquinolines. Part 37. Heterocyclization Using 3‐(Arylamino)‐ and 3‐(Hetarylamino)isoquinolin‐1(2H)‐ones.

The reaction of 3-aminoisoquinolinone derivatives with aromatic aldehydes in the presence of Tms-Cl leads to the formation of fused naphthyridine and isoquinolinone derivatives.