反応 #3865

反応方程式

8-methoxy-4-benzopyranone

triethylamine

→

desired product

4-Hydroxy-8-methoxy-2,3-dihydrobenzopyran

溶媒

ethanol

反応条件

後処理

1. 1
   ろ過The resulting solid is filtered
2. 2
   洗浄washed with diethyl ether
3. 3
   その他evaporated in vacuo

実験手順

A solution of 8-methoxy-4-benzopyranone (31.6 g), triethylamine (4.9 ml) and 10% palladium on carbon (3.1 g) in absolute ethanol (1.7 l) is stirred under an atmosphere of hydrogen (P=52 lbs.) overnight. The resulting solid is filtered, washed with diethyl ether and evaporated in vacuo yielding the desired product as a solid.

出典