3,4-dihydro-2H-pyran → 2-(2-Bromoethoxy)tetrahydro-2H-pyran

Participants

Reaction Steps

To a solution of 2-bromoethanol (10.00 g, 80 mmol) and 3,4-dihydro-2H-pyran (10.1 g, 120 mmol) in CH2Cl2 (400 mL) was added a spatula of Amberlyst-15 ion exchange resin and the reaction was stirred for 18 hrs. It was then filtered through Celite and concentrated. Distillation (40 mm Hg, b.p.=102° C.) afforded tetrahydro-2-(2-bromoethoxy)-2H-pyran (8.49 g).

Provenance & Evidence