Reaktion #1154033

Reaktionsgleichung

Sodium iodide

2-[1-(t-butoxycarbonyl)piperidin-3-yl]ethyl bromide

2-fluoro-5-bromobenzyl alcohol

sodium hydride

→

1-(t-butoxycarbonyl)-3-[2-(2-fluoro-5-bromobenzyloxy)ethyl]piperidine

Lösungsmittel

N,N-dimethylformamide

N,N-dimethylformamide

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.WAITAfter thirty minutes
2. 2
   Temperaturthe solution cooled
3. 3
   workup.STIRRINGstirred for three more hours
4. 4
   SonstigeThe reaction mixture was partitioned between brine and diethyl ether
5. 5
   WaschenThe organic fraction was washed six times with brine
6. 6
   Trocknendried over sodium sulfate
7. 7
   SonstigeThe desired title product was further purified by liquid chromatography

Vorschrift

In a 25 ml round bottom flask, 2-[1-(t-butoxycarbonyl)piperidin-3-yl]ethyl bromide (1.011 g, 3.46 mmol) was dissolved in N,N-dimethylformamide (9 ml). Sodium iodide (1.037 g, 6.92 mmol) was added and the resulting mixture was stirred at ambient temperature for ten minutes. The 2-fluoro-5-bromobenzyl alcohol (0.852 g, 4.15 mmol) and sodium hydride (60%, 208 mg, 5.19 mmol) were then added and the resulting mixture began to froth and exotherm. After thirty minutes, the solution cooled and solidified. Three milliliters of N,N-dimethylformamide was added and the mass was slurried and stirred for three more hours. The progress of the reaction was monitored by thin layer chromatography. The reaction mixture was partitioned between brine and diethyl ether. The organic fraction was washed six times with brine, and then dried over sodium sulfate. The desired title product was further purified by liquid chromatography.

Quelle