urea in xylene T=150°C;

palladium diacetate; 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene; trichlorophosphate T=140°C; 20 h; Inert atmosphere;

in chloroform T=20 - 80°C;

acetic anhydride; urea 1) reflux, 24h, 2) xylene, reflux, 20h; Yield given. Multistep reaction;

T=170°C;

1: With borane-THF in tetrahydrofuran T=20 - 60°C; 2: With hydrogenchloride in tetrahydrofuran; methanol; water T=0°C; 1 h; Heating / reflux;

1: methanol With iodobenzene; toluene-4-sulfonic acid; sodium sulfate; 3-chloro-benzenecarboperoxoic acid T=0°C; 0.166667 h; Inert atmosphere; 2: 5-methyl-isoindole-1,3-dione With 1,8-diazabicyclo[5.4.0]undec-7-ene T=0 - 40°C; Hofmann-type rearrangement; 5 h; Inert atmosphere; regioselective reaction;

hydrogenchloride; tin; acetic acid 3 h; Reflux;