(1H-TETRAZOL-5-YL) -2 (1H) - QUINOLINONES AND PROCESS FOR PREPARATION THEREOF

摘要

2(1H)-Quinolinones of formula (I) and their pharmaceutically acceptable salts are prepd. by reacting cyano-2(1H)-quinolinone with sodium azide and NH4Cl in an inert solvent. In (I), A= -CA= or -N=; R= H or C1-4 alkyl; X= H, C1-4 alkyl, C1-4 alkoxy, halogen, methyl mercapto or methylsulfonyl; n= 0, 1 or 2; two X form methylenedioxy together. (I) are useful for treating allergic diseases.