1: 1,3-cylohexanedione With potassium tert-butylate in tetrahydrofuran T=20°C; 0.75 h; 2: 2-nitro-1,3-bis(dimethylamino)trimethinium hexafluorophosphate T=20°C; 0.75 h; 3: With ammonium acetate 6 h; Heating; Further stages.;

pyridine; p-toluenesulfonyl chloride 1. dimethylformamide, < 0 deg C 2. DMF, 2h; Yield given. Multistep reaction;