反应详情

58.9 g of 1-benzyloxymethyl-1-(hydroxymethyl)cyclopropane and 88.5 g of triphenylphosphine are dissolved in 600 ml of methylene chloride, and 60 g of N-bromosuccinimide are added in portions at 0° C. The reaction mixture is stirred at room temperature for 16 h and concentrated and the residue is purified by means of FC over 3 kg of silica gel with a 1:1 mixture of methylene chloride and hexane as the eluting agent. This gives 68 g of the pure title compound: Rf (1:1 mixture from methylene chloride and hexane)=0.50.

1. concentrationconcentrated
2. customthe residue is purified by means of FC over 3 kg of silica gel with a 1:1 mixture of methylene chloride and hexane as the eluting agent