反応 #487509

反応方程式

sulfuric acid

sulfuric acid

alizarin

→

purpurin

溶媒

water

water

反応条件

後処理

1. 1
   その他had been prepared
2. 2
   温度cooling
3. 3
   workup.ADDITIONwas added over 1 hour to a reaction liquid
4. 4
   その他the reaction liquid
5. 5
   洗浄being washed with 400 mL of water
6. 6
   ろ過filtered
7. 7
   ろ過The crystal collected by filtration
8. 8
   洗浄was washed with 300 mL of methanol
9. 9
   その他dried

実験手順

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.

出典