Reaktion #2507901

Reaktionsgleichung

1-chloro-2-methoxy-4-nitrobenzene

2-(tetrahydrofuran-2-yl)ethanol

NaH

→

2-(2-(2-methoxy-4-nitrophenoxy)ethyl)tetrahydrofuran

Ausbeute 73.0%

Lösungsmittel

DMSO

DMSO

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGThe reaction mixture was stirred overnight
2. 2
   Sonstigequenched with 15 mL of H2O
3. 3
   Extraktionextracted with EtOAc (3×30 mL)
4. 4
   Trocknendried over Na2SO4
5. 5
   Sonstigeconc. in vacuo to yield a brown oil
6. 6
   SonstigeThe oil was purified by column chromatography (silica gel, 0%-35% gradient elution with EtOAc/hexanes)

Vorschrift

To a solution of 2-(tetrahydrofuran-2-yl)ethanol (1.0 g, 8.61 mmol), prepared following the procedure as described in Synthesis, 594 (1996), in 15 mL of DMSO was added NaH (344 mg, 8.61 mmol, 60% in mineral oil) in portions. After the resulting suspension was stirred for 15 min., a solution of 1-chloro-2-methoxy-4-nitrobenzene in 5 mL of DMSO was added dropwise. The reaction mixture was stirred overnight, quenched with 15 mL of H2O, and extracted with EtOAc (3×30 mL). The organic layers were combined, dried over Na2SO4, and conc. in vacuo to yield a brown oil. The oil was purified by column chromatography (silica gel, 0%-35% gradient elution with EtOAc/hexanes) to yield 1.68 g (73%) of 2-(2-(2-methoxy-4-nitrophenoxy)ethyl)tetrahydrofuran as a yellow solid. MS (ESI) 268 (M+H)+. Subsequent conversion of the aryl nitro substituent to the title aryl amine was accomplished in 98% yield, following the procedure described in Example 6 step C. MS (ESI) 238 (M+H)+.

Quelle