抄録
4-Chlorocinnoline 1-oxide (III), 4-chlorocinnoline 2-oxide (IV), 4-methoxycinnoline 1-oxide (IX), 4-methoxycinnoline 2-oxide (X), 4-ethoxycinnoline 2-oxide (VIII), 4-hydroxycinnoline 1-oxide (XI), and 4-hydroxycinnoline 2-oxide (XII) were synthesized. By treating with methyl iodide, 4-hydroxycinnoline 2-oxide gave X, while 4-hydroxycinnoline 1-oxide gave IX, and 1-methoxy-4 (1H)-cinnolinone. In the N-oxidation of 4-chlorocinnoline and 4-methoxycinnoline, the yields of 2-oxides were much more compared with those of 1-oxides.
