反应详情

Oxalyl chloride (6.0 g. 47 mmol) was added to a stirred mixture of 1-ethoxycarbonylcyclopropane carboxylic acid (1a) (6 g, 38 mmol) in benzene (25 ml) plus two drops of dimethylformamide. After the gas evolution ceased, the stirring was continued at room temperature for another hour. The reaction mixture was concentrated. The residue was purified by distillation. A fraction collected at 91°-2° C./15 mm was redistilled to give the desired product.

1. waitthe stirring was continued at room temperature for another hour
2. concentrationThe reaction mixture was concentrated
3. distillationThe residue was purified by distillation
4. customA fraction collected at 91°-2° C./15 mm
5. distillationwas redistilled