Diethyl Ether → HCID 10889914, compound

Participants

Reaction Steps

A solution of 10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5-one (9.4 g, 0.045 mol) in dry THF (100 ml) was placed under an atmosphere of nitrogen. A solution of vinylmagnesium bromide in THF (100 ml, 0.5 M) was added in such a rate to keep the reaction temperature at 30°-35° C. When addition was complete the mixture was heated at 50°-60° C. for 1.5 h. The reaction mixture was cooled on an ice-bath and a solution of ammonium chloride (10 g) in water (50 ml) was carefully added. Diethyl ether (100 ml) was added and the phases were separated. The aqueous phase was extracted with diethyl ether (100 ml) and the combined organic phases were dried over sodium sulphate. The solvent was evaporated in vacuo to give a residue which was re-evaporated twice with dichloromethane to give 11.8 g of crude 5-ethenyl-10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5-ol.

Provenance & Evidence