反应详情

90 g of the allyl ether of step 2 were heated to 210° C. under nitrogen atmosphere within 2 h. After cooling the melt was dissolved in 300 ml of benzine (boiling range: 50°-75° C.) and placed in a cool place. The precipitate formed was filtered with suction the next day.

1. temperatureAfter cooling the melt
2. customThe precipitate formed
3. filtrationwas filtered with suction the next day