Reaktion #1558889

Reaktionsgleichung

chloromethyl methyl ether

6-methoxypyridin-3-ol

NaH

→

2-methoxy-5-(methoxymethoxy)pyridine

Ausbeute 89.3%

Lösungsmittel

DMF

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONUpon the completion of addition
2. 2
   workup.STIRRINGstirred at 0-5° C. for another 20 min
3. 3
   Sonstigequenched with NH4Cl(sat.) solution
4. 4
   ExtraktionThe aqueous layer was extracted with EtOAc (3×100 mL)
5. 5
   Waschenthe combined organic layers were washed with water and brine
6. 6
   Trocknendried over Na2SO4
7. 7
   Einengenconcentrated
8. 8
   Sonstigepurified on silica gel using 25% EtOAc/hexanes as eluent

Vorschrift

To a solution of 6-methoxypyridin-3-ol (20 g, 0.16 mol, 1 eq.) in DMF (200 mL) was added NaH (60% in mineral oil; 9.6 g, 0.24 mol, 1.5 eq.) at 0-5° C. portion-wise. Upon the completion of addition, the mixture was continued to stir at 0-5° C. for 15 min, added chloromethyl methyl ether (15.5 g, 0.19 mol, 1.2 eq.), stirred at 0-5° C. for another 20 min, and quenched with NH4Cl(sat.) solution. The aqueous layer was extracted with EtOAc (3×100 mL) and the combined organic layers were washed with water and brine, dried over Na2SO4, concentrated, and purified on silica gel using 25% EtOAc/hexanes as eluent to give 2-methoxy-5-(methoxymethoxy)pyridine (24.1 g, 89.3%) as a colorless oil. 1H NMR (400 MHz; CDCl3) 7.97 (d, 1H), 7.35 (dd, 1H), 6.70 (d, 1H), 5.12 (s, 2H), 3.91 (s, 3H), 3.51 (s, 3H). LRMS (M+H+) m/z 170.1

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