反应详情

115 g (0.4 mol) of methyl (E)-2-bromomethyl-β-methoxycinnamate and 105 g (0.4 mol) of triphenylphosphine in 700 ml of tetrahydrofuran are refluxed for 24 h. Filtration with suction and washing with tetrahydrofuran result in 181 g (82% yield) of (E)-2-(1-methoxy-2-methoxycarbonylethenyl)benzyltriphenylphosphonium bromide in the form of colorless crystals with melting point 189°-192° C.

1. filtrationFiltration with suction
2. washwashing with tetrahydrofuran