反应详情

A solution of 3-trifluoromethyl-5-hydroxymethylisoxazole [(700 mg, 4.2 mmol) See K. Tanaka et al, Bull. Chem. Soc. Jpn., 57, 2184 (1984)] and triphenylphosphine (1.43 g, 5.4 mmol) in carbontetrachloride (50 ml) and dichloromethane (20 ml) is heated at reflux for 6 hours. The reaction mixture is then cooled to room temperature and passed through a silica gel plug. Concentration affords in 82% yield the desired 5-chloromethyl-3-trifluoromethylisoxazole of sufficient purity for the following step (Example 24).

1. temperatureat reflux for 6 hours
2. concentrationConcentration