Ethyl trimethylsilylacetate → Ethyl 3-(1-methyl-1H-imidazol-5-yl)-3-(4-(tetrahydro-2H-pyran-2-yloxy)phenyl)acrylate

Participants

Reaction Conditions

Reaction Steps

To a solution of lithium bis(trimethylsilyl)amide (6.8 mmol, 1 M in THF) was added ethyl trimethylsilylacetate (6.5 mmol) dropwise at −78° C. After 20 minutes at −78° C., a solution of 4.2 (5.9 mmol) in THF (20 mL) was added dropwise. The reaction was maintained at −78° C. for 3 hours and at −45° C. for 2 hours. The reaction was quenched with saturated NH4Cl (aq) at 0° C. and warmed to room temperature. The mixture was extracted with EtOAc (500 mL), dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure to afford crude 4.3 (2.49 g). MS ESI (pos.) m/e 357.2 (M+H).

Provenance & Evidence