反应详情

2-Methyl-4-(1-methyl-cyclopropyl)-benzoic acid (2.139 g, 11.243 mmol) and phosphoruspentachloride (2.575 g, 12.37 mmol) were charged into a 50 ml flask under stirring. These both solids dissolved at 100° C. The reaction mixture was stirred 2 hours at 120° C. with an reflux condenser in a N2 atmosphere. After that the resulting phosphorus oxylchloride was distilled off at 140° C. from the reaction mixture. The whole reaction mixture was cooled to room temperature and the reaction mixture still remained as a solution. The desired product was distilled by Kugelrohr distillation (150° C./4 mbar) to give 2-Methyl-4-(1-methyl-cyclopropyl)-benzoyl chloride (1.92 g, 9.2 mmol)

1. dissolutionThese both solids dissolved at 100° C
2. distillationAfter that the resulting phosphorus oxylchloride was distilled off at 140° C. from the reaction mixture
3. customThe whole reaction mixture
4. distillationThe desired product was distilled by Kugelrohr distillation (150° C./4 mbar)