Reacción #40268

Ecuación de reacción

1-chloro-6-bromo-2-naphthol

1-heptyne

→

1-chloro-6-(1-pentynyl)-2-naphthol

Rendimiento 88.7%

Disolventes

triethylamine

Condiciones de reacción

Tratamiento posterior

1. 1
   OtroThe synthesis of (S7-3)
2. 2
   Otrodescribed in Synthesis
3. 3
   Temperaturarefluxed for 6 hours
4. 4
   TemperaturaThe reaction solution was cooled to room temperature
5. 5
   workup.DISTILLATIONdistilled under a reduced pressure
6. 6
   Otroto remove the solvent
7. 7
   workup.ADDITIONthe residue was added with ethyl acetate
8. 8
   Filtraciónfiltered by celite
9. 9
   LavadoThe resulting solution was washed with 1N HCl(aq) and water
10. 10
    Secadodried over anhydrous magnesium sulfate
11. 11
    OtroThe solvent was removed by distillation under a reduced pressure
12. 12
    OtroThe residue was purified by silica gel column chromatography
13. 13
    Otrodried under a reduced pressure

Procedimiento

The synthesis of (S7-3) was carried out following the method described in Synthesis, No. 9, 1439 (2004). At first, 38.3 g of 1-chloro-6-bromo-2-naphthol (S1-2), 5.2 g of PdCl2(PPh3)2, 0.71 g of copper iodide and 400 ml of triethylamine were added to a reactor in nitrogen atmosphere, stirred at room temperature, added with 35.8 g of 1-heptyne (S7-2) and then refluxed for 6 hours. The reaction solution was cooled to room temperature and distilled under a reduced pressure to remove the solvent, and then the residue was added with ethyl acetate and filtered by celite. The resulting solution was washed with 1N HCl(aq) and water, and dried over anhydrous magnesium sulfate. The solvent was removed by distillation under a reduced pressure. The residue was purified by silica gel column chromatography using heptane/ethyl acetate=3/1 as an eluting solvent and dried under a reduced pressure to obtain 32.3 g of 1-chloro-6-(1-pentynyl)-2-naphthol (S7-3).

Fuente