Dimethyl Sulfoxide → 2-Oxoethyl butyrate

Temperature

0 °C

To a mechanically stirred suspension of P2O5 (42.53 g, 150 mmol) in dry DCM (100 ml) at 0° C., was slowly added 30 (11.0 g, 83 mmol), followed by DMSO (13 g, 11.8 ml, 166 mmol). After stirring at 0° C. for 1 h, the ice bath was removed and the mixture further stirred at rt for 1.5 h. It was then cooled to 0° C., and then Et3N (42 g, 58 ml, 416 mmol) was slowly added. The reaction was then left with stirring for 6 hours at room temperature. The reaction was quenched by adding 1.0 M HCl (60 ml) at 0° C., and left with stirring for 30 minutes at 0° C. The organic layer was then washed with water (2×250 ml), dried, filtered and evaporated to afford 24 (6.60 g, 51 mmol, 61%) as a yellow liquid, that was used in the next step without any further purification.

1. customthe ice bath was removed
2. stirringthe mixture further stirred at rt for 1.5 h
3. temperatureIt was then cooled to 0° C.
4. waitThe reaction was then left
5. stirringwith stirring for 6 hours at room temperature
6. customThe reaction was quenched
7. additionby adding 1.0 M HCl (60 ml) at 0° C.
8. waitleft
9. stirringwith stirring for 30 minutes at 0° C
10. washThe organic layer was then washed with water (2×250 ml)
11. customdried
12. filtrationfiltered
13. customevaporated

ORD record

ord-0c9830ed7aa7493da7654f243898bb11

Source dataset

uspto-grants-2003_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06576776B1