Methacrolein → 8-Methyl-1,6-dioxaspiro[4.5]dec-7-ene

Reaction equation

[CH2:1]=[C:2]1[CH2:6][CH2:5][CH2:4][O:3]1.[O:7]=[CH:8][C:9](=[CH2:11])[CH3:10].C(=O)([O-])[O-].[K+].[K+]>>[CH3:10][C:9]1[CH2:11][CH2:1][C:2]2([O:3][CH2:4][CH2:5][CH2:6]2)[O:7][CH:8]=1

Participants

Reactant 3

HCID 6562Methacrolein

HCID 11430Potassium Carbonate

HCID 11083822Furan, tetrahydro-2-methylene-

Product 1

HCID 132371808-Methyl-1,6-dioxaspiro[4.5]dec-7-ene

Conditions

Temperature: 75 °C

Procedure

A stirred mixture of 20.0 g of 2-methylenetetrahydrofuran, 17.7 g of reagent grade methacrolein and 0.4 g of potassium carbonate was maintained at 75° C. under nigrogen atmosphere for 7 days. Distillation of the reaction mixture yielded 19.1 g of the desired product, b.p. 65°-66° C. (4 torr.).