Dimethyl Sulfoxide → o-Phenoxybenzaldehyde

To a solution of oxalyl chloride (6.82 g, 53.71 mmol) in CH2Cl2 (250 mL) at -78° C., was added dimethylsulfoxide (8.76 g, 112.1 mmol) dropwise. The mixture was stirred for 5 mins. A solution of crude 2-phenoxybenzyl alcohol from above in CH2Cl2 (20 mL) was added dropwise. Upon completion of addition, the reaction was stirred for 20 mins at -78∞C. Triethylamine (23.58 g, 233.5 mmol) was then added dropwise. The cooling bath was removed and the reaction allowed to warm to room temperature It was then diluted with brine (250 mL). The layers were separated and the aqueous was extracted with CH2Cl2 (2×250 mL). The organics were combined, dried with MgSO4 and concentrated. The resulting residue was chromatographed (silica gel, ether:hexanes, 20:80) to afford 7.65 g (83% over the two steps) of 2-phenoxybenzaldehyde as a pale yellow oil.

1. additionUpon completion of addition
2. stirringthe reaction was stirred for 20 mins at -78∞C
3. customThe cooling bath was removed
4. additionwas then diluted with brine (250 mL)
5. customThe layers were separated
6. extractionthe aqueous was extracted with CH2Cl2 (2×250 mL)
7. dry with materialdried with MgSO4
8. concentrationconcentrated
9. customThe resulting residue was chromatographed (silica gel, ether:hexanes, 20:80)

ORD record

ord-0943b35bcadb4d43b99740eeea41394b

Source dataset

uspto-grants-1992_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05120752