1: methanethiol With n-butyllithium; triphenylemethane in tetrahydrofuran; hexane T=-30°C; 2: N,N-di-isopropyl carbamoylchloride in tetrahydrofuran; hexane T=20°C; 18 h;

1: carbon monoxide; diisopropylamine With sulfur; 1,8-diazabicyclo[5.4.0]undec-7-ene in dimethyl sulfoxide T=20°C; P=760 Torr; 5 h; 2: methyl iodide in dimethyl sulfoxide T=20°C; 1 h;

1: sulfur / tetrahydrofuran / 18 h / 20 °C / 760 Torr 2: tetrahydrofuran / 2 h / 20 °C View Scheme

in tetrahydrofuran T=20°C; 2 h;