Vinyl chloroformate → HCID 15928270, compound

Participants

Reaction Steps

A solution of 2.0 g of the product from step C above, 1.8 g (16.5 mmol) of vinyl chloroformate and 3.5 g (16.5 mmol) of 1,8-bis-dimethylaminonaphthalene in 40 ml of dichloromethane was heated to reflux for 6 hr. The mixture was then cooled to ambient temperature and concentrated under vacuum. The residue was dissolved in diethyl ether and was washed twice with 10% aqueous sodium hydrogen sulfate and once with saturated aqueous sodium bicarbonate. The organic layer was dried over magnesium sulfate, filtered and concentrated under vacuum. Preparative HPLC afforded 1.8 g (79%) of the desired intermediate, [α]D =-24.8° (c=1, dichloromethane).

Provenance & Evidence