反应 #1135826

反应方程式

2-Methylresorcinol

3,4-dimethoxyphenylacetic acid

boron trifluoride diethyl etherate

BF3.OEt2

→

1-(2,4-dihydroxy-3-methyl-phenyl)-2-(3,4-dimethoxy-phenyl) ethanone

反应条件

后处理

1. 1
   其他The round bottom flask was attached to a condenser
2. 2
   其他placed in an oil bath
3. 3
   其他A yellow solid formed at 75 minutes
4. 4
   温度The reaction was heated for a further 10 minutes
5. 5
   温度cooled to room temperature
6. 6
   过滤The yellow solid was collected by suction filtration
7. 7
   洗涤washed with distilled water (200 ml)
8. 8
   其他to remove any excess BF3.OEt2 present
9. 9
   其他The solid was dried on a freeze dryer for 24 hours (6.303 g, 43%)

实验过程

2-Methylresorcinol (6.285 g, 1 equivalent) and 3,4-dimethoxyphenylacetic acid (9.251 g, 1 equivalent) were added to a round bottom flask. The round bottom flask was attached to a condenser and placed in an oil bath, the whole system was kept under nitrogen. Distilled boron trifluoride diethyl etherate, BF3.OEt2 (42 ml, 5 equiv.) was added to the mixture while stirring. The mixture was refluxed (110° C.). A yellow solid formed at 75 minutes indicating that the reaction had gone to completion. The reaction was heated for a further 10 minutes and cooled to room temperature. The yellow solid was collected by suction filtration and washed with distilled water (200 ml) to remove any excess BF3.OEt2 present. 1H NMR in d-DMSO indicated the yellow solid was 1-(2,4-dihydroxy-3-methyl-phenyl)-2-(3,4-dimethoxy-phenyl) ethanone in >95% purity. The solid was dried on a freeze dryer for 24 hours (6.303 g, 43%).

来源