Synthese de l'indazole‐1‐15N, de l'indazole‐2‐15N et de leurs derives n‐methyles

The synthesis of indazole‐1‐15N from 2‐nitrotoluene‐15N is described Indazole‐2‐15N has been prepared from 2‐methyl‐4‐nitroaniline and sodium nitrite‐15N through 5‐nitroindazole‐2‐15N. The N‐methyl derivatives of these three indazoles have been isolated.