Dimethyl Sulfate → HCID 20030479, compound

Participants

Reaction Steps

The resulting dark solution, which contained sodium 3-t-butylthiotetrafluoropropionate, was stirred with 69.3 g (0.55 mole) of dimethyl sulfate while the temperature was maintained at 30°. After an initial exothermic reaction subsided, the mixture was stirred overnight and then distilled to give a crude product with bp about 45° (2 mm, 2.6×10-1 kPa). The distillate was washed with 1 liter of water, dried and fractionated to give 52.1 g (42%) of methyl 3-t-butylthiotetrafluoropropionate, bp 55° (2 mm, 2.6×10-1 kPa). IR (neat): 2970 (sat'd CH), 1775 (C=O), 1100-1250 cm-1 (CF). NMR (CCl4): 1H 3.87 (s, 3H, OCH3) and 1.52 ppm (s, 9H, C(CH3)3 ; 19F-86.3 (t, JFF 7.1 Hz, 2F, CF2S) and -117.6 ppm (t, JFF 7.1 Hz, 2F, CF2C=O).

Provenance & Evidence