4-tert-Butylcyclohexanone → 2-(Bromomethyl)-8-tert-butyl-1,4-dioxaspiro[4.5]decane

Participants

Reaction Conditions

Reaction Steps

30.15 g (120 mmol) of tin(IV) chloride were added dropwise to 115.5 g (750 mmol) of 4-tert-butylcyclohexanone in 700 ml of absolute dichloromethane at 5° C., followed by the dropwise addition of 205.5 g (1.5 mol) of epibromohydrin ##STR9## in 370 ml of absolute dichloromethane in the course of 5 hours. The mixture was stirred overnight at room temperature (20° C.), hydrolyzed with a solution of 42 g of KOH in 180 ml of water while cooling, and worked up in a conventional manner. Distillation of the crude product (279 g) under reduced pressure gave 169 g (77.5%) of 8-tert-butyl-2-bromomethyl-1,4-dioxaspiro[4,5]decane of boiling point 110° C./0.2 mbar.

Provenance & Evidence