반응 #487509

반응 방정식

sulfuric acid

sulfuric acid

alizarin

→

purpurin

용매

water

water

반응 조건

후처리

1. 1
   기타had been prepared
2. 2
   온도cooling
3. 3
   workup.ADDITIONwas added over 1 hour to a reaction liquid
4. 4
   기타the reaction liquid
5. 5
   세척being washed with 400 mL of water
6. 6
   여과filtered
7. 7
   여과The crystal collected by filtration
8. 8
   세척was washed with 300 mL of methanol
9. 9
   기타dried

실험 절차

A suspension of 17.5 g of manganese dioxide/40 g of concentrated sulfuric acid, that had been prepared by putting 9.0 g of water and 130 g of 96% sulfuric acid into 30 g of alizarin (manufactured by Sigma-Aldrich Corporation), followed by ice-cooling, was added over 1 hour to a reaction liquid while maintaining it at 10° C. or lower. After 2 hours, the reaction liquid was poured into 1 L of water, with the inside of the container being washed with 400 mL of water, and filtered. The crystal collected by filtration was washed with 300 mL of methanol and dried to obtain 32.4 g of purpurin.

출처