Water → HCID 23047899, compound

Participants

Reaction Steps

8.1 g (0.186 mol) of 55% sodium hydride in a mineral oil suspension is added in portions to a solution of 63.4 g (0.186 mol) of ethyl 7-(4-chlorophenyl)-2-ethoxycarbonylheptanoate (BM 13.861) in 500 ml of absolute tetrahydrofuran, and stirred for another 15 minutes to complete the salt formation. Then 33.1 g (0.186 mol) of N-bromosuccinimide is added and the mixture is stirred for 8 h at room temperature. Then it is poured into water, acidified, and extracted with ether. The combined extracts are washed, dried and concentrated by evaporation. The concentrate is chromatograhied with toluene on silica gel. 61.3 g (78% of theory) of ethyl 2-bromo-7-(4-chlorophenyl)-2-ethoxycarbonylheptanoate, a colorless oil, is obtained.

Provenance & Evidence