反应详情

8.6 g of the azo obtained in step (2) above, 35 ml of acetonitrile, and 8.6 ml of N,N-dimethylacetamide were put into a 100 ml three-necked flask and 8.6 ml of phosphorus oxychloride was added dropwise to the mixture at a temperature of 50° C. or below. After completion of the dropwise addition, the mixture was stirred for 30 minutes and then poured into ice water. The crystals thus deposited were collected by filtration.

1. additionAfter completion of the dropwise addition
2. filtrationThe crystals thus deposited were collected by filtration