Methyl Cinnamate → Methyl 4-methylene-2-phenylcyclopentanecarboxylate, trans-

Beteiligte Stoffe

Reaktionsschritte

A mixture of methyl trans-cinnamate (5.0 g, 31 mmol), tetrakis(triphenylphosphine) palladium(0) (2.6 g, 2.3 mmol), 1,2-bis(diphenylphosphino)ethane (0.70 g, 1.8 mmol) and 2-((trimethylsilyl)methyl)-2-propen-1-yl acetate (6.90 g, 37 mmol) in THF (60 mL) under argon was heated to reflux for 4 h. An additional aliquot of 2-((trimethylsilyl)methyl)-2-propen-1-yl acetate (3.40 g) was added and the reaction was continued for another 16 h. The volatiles were then removed in vacuo and the residue was purified by FC (10% ethyl acetate in hexanes) to afford the title compound (6.2 g).

Herkunft & Nachweise