反応 #2254172

反応方程式

5,7-Diacetoxy-3-acetyl-2-methylchromen-4-one

HCl

→

5,7-dihydroxy-2-methylchromen-4-one

溶媒

sodium carbonate

反応条件

後処理

1. 1
   温度After cooling
2. 2
   温度cooled
3. 3
   ろ過The precipitate is filtered off
4. 4
   その他giving 0.6 g of very pale brown powder (TM=279.9° C.)

実験手順

5,7-Diacetoxy-3-acetyl-2-methylchromen-4-one is refluxed for 1 hour with 40 ml of 10% sodium carbonate solution. After cooling, the suspension is adjusted to a pH of about 6 using 2N HCl and cooled. The precipitate is filtered off, giving 0.6 g of very pale brown powder (TM=279.9° C.)

出典