1: dicobalt octacarbonyl; N,N,N'-trimethyl-N'-allylthiourea; phenylacetylene With 1,1,3,3-tetramethyl-2-thiourea in toluene Pauson-Khand reaction; 0.0833333 h; Inert atmosphere; 2: carbon monoxide in toluene T=110°C; Pauson-Khand reaction; P=2250.23 Torr; 48 h; Autoclave;

1: dicobalt octacarbonyl; N,N,N'-trimethyl-N'-allylthiourea; phenylacetylene With 1,1,3,3-tetramethyl-2-thiourea in toluene Pauson-Khand reaction; 0.0833333 h; Inert atmosphere; 2: carbon monoxide in toluene T=110°C; Pauson-Khand reaction; P=2250.23 Torr; 24 h; Autoclave;

T=400 - 450°C; P=0.05 Torr; Yield given;

1: 68 percent / LDA, TMEDA / tetrahydrofuran / Ambient temperature 2: 400 - 450 °C / 0.05 Torr View Scheme