Butanal → n-Butanal dicrotyl acetal

In a 300-ml three-necked flask, 72 g (1 mole) of n-butanal, 144 g of crotyl alcohol, 3 mg of titanium acetylacetonate, 80 g of molecular sieve 4A and 50 g of toluene were charged. The resulting mixture was stirred at 20° C. under atmospheric pressure for 12 hours in a nitrogen atmosphere. After the removal of the molecular sieve 4A from the reaction mixture, the solvent (toluene) and the unreacted starting materials were distilled off under reduced pressure. Distillation of the residue under reduced pressure gave 189.1 g of n-butanal dicrotyl acetal (boiling point: 116° C./25 mmHg) (yield: 95.5%).

1. customAfter the removal of the molecular sieve 4A from the reaction mixture
2. distillationthe solvent (toluene) and the unreacted starting materials were distilled off under reduced pressure
3. distillationDistillation of the residue under reduced pressure

ORD record

ord-1083e6383f0346da8a1eb6f0d2893a8a

Source dataset

uspto-grants-1998_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05792876