HCl; NH3 in methanol; water dissoving of (C5H5)Fe(C5H4CH(CH3)C2H2N3) in methanol on heating; addn. of soln. of indazole in H2O and concd. HCl; reflux for 2.5 h, cooling, neutralizing with aq. ammonia; extn. with dimethyl ether, sepn. of org. layer; monitoring by mass-spectroscopy and comparative chromy. on Silufol plate;