1,1-Dimethoxy-2-methyl-2-acetoxy-but-3-ene → 4,4-Dimethoxy-3-methyl-crotyl acetate

Participants

Reaction Conditions

Reaction Steps

564 parts of 1,1-dimethoxy-2-methyl-2-acetoxy-but-3-ene and 0.3 parts of copper (I) chloride were heated, with stirring, at 147° C., under a pressure of 0.2 bar, in a reaction vessel equipped with a stirrer, an internal thermometer, and a descending condenser. During the reaction time of 7.5 hours, the low-boiling products formed distilled off continuously and the reaction temperature rose to 157° C. Subsequent working up of the reaction mixture by distillation gave 459 parts of 4,4-dimethoxy-3-methyl-crotyl acetate, corresponding to a yield of 81.4% of theory.

Provenance & Evidence