1: 3,4-dihydro-6-methyl-4-phenyl-2H-benzopyran-2-one With diisobutylaluminium hydride in toluene T=-25°C; 5 h; 2: With citric acid in water; ethyl acetate; toluene T=20°C; 3: diisopropylamine With hydrogen; 5-palladium/activated carbon in methanol T=48°C; P=3800.26 Torr; 12 h;

1: With morpholine T=100°C; 6 h; 2: With hydrogenchloride in water T=75 - 80°C; 12.75 h; Product distribution / selectivity;

citric acid in methanol; ethyl acetate; toluene

[RhCl(η2:η2-cycloocta-1,5-diene)]2; hydrogen in toluene T=100°C; P=76005.1 Torr; 72 h; Reagent/catalyst;

Rh(CO)2acac/Xantphos; hydrogen in toluene T=100°C; P=76005.1 Torr; 72 h; Reagent/catalyst;

1: activated acid alumina S / 1,2-dichloro-benzene / 72 h / |Reflux 2: hydrogen; [RhCl(η2:η2-cycloocta-1,5-diene)]2 / toluene / 72 h / 100 °C / 76005.1 Torr View Scheme

1: activated acid alumina S / 1,2-dichloro-benzene / 72 h / |Reflux 2: hydrogen; [RhCl(η2:η2-cycloocta-1,5-diene)]2 / toluene / 72 h / 100 °C / 76005.1 Torr View Scheme

hydrogen; palladium hydroxide on carbon in methanol; toluene T=110°C; P=4654.46 Torr; 48 h;