Isobutyraldehyde → HCID 60797754, compound

Temperature

45 °C

To a suspension of magnesium (2.98 g, 0.123 mol) in ether (30 mL) was added iodine (0.165 g, 0.000651 mol). To this was slowly added a solution of 4-chlorobenzyl bromide (24.00 g, 0.1168 mol) in ether (100 mL). Upon addition of approximately 1 mL of solution an exotherm was noted and the mixture reached reflux. The addition of solution was slowly continued to maintain a gentle reflux (˜90 min). On completion of addition, the reaction was heated for 30 minutes at 45° C. The reaction was then cooled to 0° C. Isobutyraldehyde (12.7 mL, 0.140 mol) in ether (10 mL) was then added slowly over 2 hours. On completion of the addition the reaction was allowed to warm to 23° C. and stirred overnight. The reaction was quenched with ice (˜200 g) and acidified with 2M HCl (˜100 ml). This was extracted twice with ether and the organic phase was evaporated. The residue was purified by flash chromatography (0 to 10% MeOH/CH2Cl2) to afford the title compound (9.89 g, 43%).

1. temperaturethe mixture reached reflux
2. additionThe addition of solution
3. temperatureto maintain
4. temperaturea gentle reflux (˜90 min)
5. additionOn completion of addition
6. temperatureThe reaction was then cooled to 0° C
7. additionOn completion of the addition the reaction
8. temperatureto warm to 23° C.
9. customThe reaction was quenched with ice (˜200 g)
10. extractionThis was extracted twice with ether
11. customthe organic phase was evaporated
12. customThe residue was purified by flash chromatography (0 to 10% MeOH/CH2Cl2)

ORD record

ord-d0e74d93b7bf424ba51c44b773ba89c6

Source dataset

uspto-grants-2015_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09150525B2