Hydroquinone → HCID 12546025, compound

Participants

Reaction Conditions

Reaction Steps

54 g of a mixture of 3-methoxy-4-methyl-3-pentene (I, with R = CH3) and 3-methoxy-4-methyl-2-pentene (II, with R = CH3), which according to the nuclear resonance spectrum comprises about 95% of I and about 5% of II, 32 g of acrolein and 1 g of hydroquinone are heated at 165° C. for 20 hours. Distillation of the reaction mixture gives 58 g of the desired 2-methoxy-2-ethyl-3,3-dimethyl-2,3-dihydro-4H-pyran of boiling point 64° - 67° C./13 mm Hg. This corresponds to a yield of 72% of theory.

Provenance & Evidence