Reaktion #165683

Reaktionsgleichung

2,2,5,5-tetramethyldihydrofuran-3(2H)-one

bromine

→

title compound

4-bromo-2,2,5,5-tetramethyldihydrofuran-3(2H)-one

Lösungsmittel

CH2Cl2

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigequenched with NaHCO3 powder in small portions
2. 2
   Filtrationfiltered
3. 3
   Einengenconcentrated under reduced pressure

Vorschrift

To a solution of commercially available 2,2,5,5-tetramethyldihydrofuran-3(2H)-one (Aldrich, 10.0 g, 0.07 mol) in CH2Cl2 (100 mL) was added bromine (Aldrich, 3.6 mL, 0.07 mol,) dropwise at room temperature. The reaction mixture was stirred for 2 hours over which time the reaction mixture became clear. Then, the reaction mixture was cooled to 0° C., quenched with NaHCO3 powder in small portions, filtered and concentrated under reduced pressure to afford the title compound. 1H NMR (300 MHz, dimethylsulfoxide-d6) δ ppm 1.26 (s, 3H), 1.27 (s, 3H), 1.30 (s, 3H), 1.39 (s, 3H), 5.22 (s, 1H).

Quelle