3-(2',4',5'-Triethoxybenzoyl)-trans-acrylic acid → Trepibutone

Beteiligte Stoffe

Reaktionsschritte

A mixture of 1.0 part by weight of 3-(2',4',5'-triethoxybenzoyl)-trans-acrylic acid, 50 parts by volume of methanol and 0.2 part by weight of 5% palladium-charcoal is subjected to catalytic reduction at 25° C. under atmospheric pressure for 1 hour. After removal of the catalyst by filtration, the filtrate is evaporated and the residue is recrystallized from aqueous ethanol to give 0.85 part by weight of 3-(2',4',5'-triethoxybenzoyl)-propionic acid as pale yellow needles melting at 150°-151° C.

Herkunft & Nachweise