反应详情

A mixture of 187 parts of cinnamic alcohol, 360 parts of 3,3-dimethylacrolein and 550 parts of toluene is heated with 33 parts of glacial acetic acid in a V4A steel stirred vessel having a capacity of 5 liters for six hours at 140° C. at a pressure of 2 atmospheres, the water forming being continuously removed as an azeotropic mixture with toluene. The product is distilled. 149 parts of 3-methyl-7-phenyl-2,6-heptadien-1-al is obtained having a boiling point of 118° to 120° C. at 10-3 mm. The yield is 81% of theory (based on cinnamic alcohol) at a conversion of 66%.

1. customfor six hours
2. customat 140° C.
3. customthe water forming being continuously removed as an azeotropic mixture with toluene
4. distillationThe product is distilled