Dimethyl Sulfoxide → 2,2-Dimethyl-1,3-dioxolane-4-carboxaldehyde

Temperatur

-60 °C

A solution of anhydrous DMSO (3.41 mL, 48 mmol) in CH2Cl2 (5 mL) was added dropwise to a stirred solution of oxalyl chloride (1.92 mL, 22 mmol) in CH2Cl2 (50 mL) at −60° C. To this mixture was added a solution of (2,2-dimethyl-[1,3]dioxolan-4-yl)-methanol (2.48 mL, 20 mmol) in CH2Cl2 (10 mL). The resulting mixture was stirred for 15 min at −60° C. TEA (13.9 mL, 100 mmol) was added dropwise. The reaction mixture was then warmed to room temperature. Water (50 mL) and CH2Cl2 (50 mL) were added. The organic layer was separated and washed with water (25 mL). The aqueous layer was extracted with CH2Cl2 (3×50 mL). The organic layers were dried over MgSO4, filtered, and concentrated under reduced pressure to afford the crude 2,2-dimethyl-1,3-dioxolane-4-carbaldehyde that was used directly without further purification.

1. temperatureThe reaction mixture was then warmed to room temperature
2. customThe organic layer was separated
3. washwashed with water (25 mL)
4. extractionThe aqueous layer was extracted with CH2Cl2 (3×50 mL)
5. dry with materialThe organic layers were dried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure

ORD-Eintrag

ord-0ecb885addee473b936a27c496770b68

Quelldatensatz

uspto-grants-2013_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08524702B2