(Trifluoromethyl)trimethylsilane → HCID 66999612, compound

Participants

Reaction Conditions

Reaction Steps

Add tetrabutylammonium triphenyldifluorosilicate (29.8 g, 55.19 mmol) to a stirring mixture of (S,E)-N-(1-(2-bromo-4-fluorophenyl)ethylidene)-2-methylpropane-2-sulfinamide (13 g, 42.46 mmol) in THF. Cool the mixture to about −60° C. and add the (trifluoromethyl)trimethylsilane over about 10 min. Warm up to −55° C. and stir for 2 h. Continue to warm up to 0° C. Cool the mixture back to −30° C., and quench with saturated NH4Cl (150 mL). Extract product into ethyl acetate (2×200 mL). Combine extracts, wash with aqueous saturated sodium chloride, dry over Na2SO4, filter, and concentrate. Purify the material on 700 g silica eluting with 8:2 to 1:1 hexanes:ethyl acetate to a crude material. Crystallize the material to give long needles (9.7 g, 91%). MS (ES) m/z 377 [M+1]+.

Provenance & Evidence