Dimethyl Sulfoxide → 2-(8-Bromooctyl)-1,3-dioxolane

To a cooled (−78° C.) solution of oxalyl chloride (11.66 g, 92 mmol) in DCM (250 mL), a solution of dimethylsulfoxide (DMSO) (13.0 mL, 183 mmol) in DCM (50 mL) was added over 15 minutes. After a further 5 minutes, a solution of 9-bromononanol (10.25 g, 45.9 mmol) in DCM (50 mL) was added dropwise over 15 minutes. The resulting reaction mixture was stirred at this temperature for 45 minutes. Triethylamine (32 mL, 230 mmol) was added, and the reaction mixture stirred at this temperature for 10 minutes. The coolant was removed and allowed to warm to RT. The reaction mixture was stirred at RT for 40 minutes and then diluted with water. The organic phase was removed and washed with 10% aqueous potassium hydrogen sulfate and dried (magnesium sulfate). The suspension was filtered and the filtrate evaporated under reduced pressure to afford the title compound.

1. customThe resulting reaction mixture
2. stirringthe reaction mixture stirred at this temperature for 10 minutes
3. customThe coolant was removed
4. stirringThe reaction mixture was stirred at RT for 40 minutes
5. additiondiluted with water
6. customThe organic phase was removed
7. washwashed with 10% aqueous potassium hydrogen sulfate
8. dry with materialdried (magnesium sulfate)
9. filtrationThe suspension was filtered
10. customthe filtrate evaporated under reduced pressure

ORD record

ord-9d82aebfa9fa494c914e1d7659fd1870

Source dataset

uspto-grants-2014_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08877774B2