lithium tri-t-butoxyaluminum hydride in tetrahydrofuran; hexane

1: 5-decyne With dibutylzirconocene; (dimethyl)(phenyl)phosphine in tetrahydrofuran T=-78 - 20°C; 1 h; 2: carbon monoxide in tetrahydrofuran T=-15°C; P=760 Torr;