Reacción #437958

Ecuación de reacción

7-fluoro-2,3-dihydro-1,5-benzothiazepin-4(5H)-one

Red-Al

sodium hydoxide

→

7-fluoro-2,3,4,5-tetrahydro-1,5-benzothiazepine

Rendimiento 93.0%

Disolventes

toluene

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturato warm to room temperature
2. 2
   TemperaturaThe reaction was heated
3. 3
   Temperaturaat reflux for 1.5 hours
4. 4
   Extracciónextracted with dichloromethane (3×25 mL)
5. 5
   Lavadowashed with water
6. 6
   Secadodried (sodium sulfate)
7. 7
   OtroThe concentrated organics were purified by preparative thin layer chromatography on silica gel
8. 8
   Lavadoeluted with 50% ethyl acetate in hexanes

Procedimiento

7-fluoro-2,3-dihydro-1,5-benzothiazepin-4(5H)-one (76 mg, 0.38 mmol) dissolved in toluene (1 mL) and cooled to 0° C. in an ice bath. Red-Al (275 mL, 0.91 mmol) was added and then the reaction allowed to warm to room temperature. The reaction was heated at reflux for 1.5 hours. 1 N sodium hydoxide was added slowly until pH >10, this was stirred for 10 minutes, extracted with dichloromethane (3×25 mL), washed with water, and dried (sodium sulfate). The concentrated organics were purified by preparative thin layer chromatography on silica gel and eluted with 50% ethyl acetate in hexanes to give 7-fluoro-2,3,4,5-tetrahydro-1,5-benzothiazepine (30.8 mg, 93%). 1H NMR (CDCl3, 300 MHz): δ 7.32 (t, 1H, J=7.5 Hz), 6.53–6.42 (m, 2H), 4.09 (s-broad, 1H), 3.31–3.27 (m, 2H), 2.83–2.79 (m, 2H), 2.11–2.04 (m, 2H) ppm.

Fuente