1: sodium formate With acetyl chloride in diethyl ether T=20°C; 5 h; 2: 2-amino-benzamide in tetrahydrofuran; diethyl ether T=0 - 20°C; 3: With N-ethyl-N,N-diisopropylamine; trichlorophosphate in dichloromethane T=0 - 20°C;

potassium hydroxide; [14C]-Tetramethylammonium bromide T=18 - 20°C;