N,N-Diethyl-1,1,2,3,3,3-hexafluoropropylamine → HCID 11336441, compound

Participants

Reaction Conditions

Reaction Steps

(4R,5R)-3-acetyl-2,2-dimethyl-4-hydroxymethyl-5-[4-(methylsulfonyl)phenyl]-1,3-oxazolidine (Compound II) (75 g, 0.2291 moles) in methylene chloride (525 ml) reacts with N,N-diethyl-1,1,2,3,3,3-hexafluoro-1-propanamine (Ishikawa Reagent) (76.7 g, 0.3437 moles) at 95-105° C. for about 4 hours. Cooling to 20-25° C., addition to sodium hydroxide (6 g) in water (2500 mL), separation of the methylene chloride layer, distillation and replacement of methylene chloride by isopropanol (750 mL), precipitates the desired product. Filtration, washing with water (100 mL) and isopropanol (75 mL), then drying yields (4S,5R)-3-acetyl-2,2-dimethyl-4-fluoromethyl-5-[4-(methylsulfonyl)phenyl]-1,3-oxazolidine (Compound IX: R1 is methylsulfonyl; R2, R3 and R4 are methyl).

Provenance & Evidence