sodium hydroxide in dichloromethane T=20°C; 2 h;

[14C]-Antipyrine in nichtwaessrigem Medium;

in diethyl ether (N2); Schlenk technique; soln. of Fe complex and chloroformate in Et2O was stirred overnight; volatiles removed (vac.); redissolved in CH2Cl2; chromd. (hexane; hexane/CH2Cl2, 1/1); recrystd. (CH2Cl2/hexane); elem. anal.;