反応 #577218

反応方程式

sodium carbonate

4-methylphenyl-boronic acid

1-chloroisoquinoline

toluene

→

1-(4-methylphenyl)isoquinoline

収率 51.1%

溶媒

ethanol

反応条件

後処理

1. 1
   workup.ADDITIONwas added
2. 2
   温度Thereafter, reflux
3. 3
   その他After completion of the reaction
4. 4
   温度the reaction product was cooled
5. 5
   抽出extracted by addition of cold water and toluene
6. 6
   洗浄The organic layer washed with saline water
7. 7
   その他dried on magnesium sulfate
8. 8
   その他followed by removal of the solvent under a reduced pressure
9. 9
   その他to provide
10. 10
    その他dry solid The residue
11. 11
    その他was purified by silica gel column chromatography (eluent: chloroform/methanol=10/1)

実験手順

In a 200 ml-three-necked flask, 3.40 g (25.0 mmole) of 4-methylphenyl-boronic acid (made by Aldrich Co.), 4.09 g (25.0 mmole) of 1-chloroisoquinoline, 25 ml of toluene, 12.5 ml of ethanol and 25 mol of 2M-sodium carbonate aqueous solution were placed and stirred at room temperature under nitrogen stream, and 0.98 g (0.85 mmole) of tetrakis(triphenylphosphine)-palladium (0) was added thereto. Thereafter, reflux under stirring was performed for 8 hours under nitrogen stream. After completion of the reaction, the reaction product was cooled and extracted by addition of cold water and toluene. The organic layer washed with saline water and dried on magnesium sulfate, followed by removal of the solvent under a reduced pressure to provide dry solid The residue was purified by silica gel column chromatography (eluent: chloroform/methanol=10/1) to obtain 2.80 g (yield=51.1%) of 1-(4-methylphenyl)isoquinoline.

出典