Potassium bis(trimethylsilyl)amide → benzyl (1S,2S,4R)-4-(tert-butyldimethylsilyloxy)-2-(prop-1-en-2-yl)cyclohexylcarbamate

Participants

Reaction Conditions

Reaction Steps

Methyltriphenylphosphonium bromide (1.2 g) was suspended in toluene (16 mL) prior to the addition of 0.5M potassium bis(trimethylsilyl)amide (5.8 mL) in toluene. After 1 h, this solution was cooled to 0° C. prior to the addition of benzyl (1S,2R,4R)-2-acetyl-4-(tert-butyldimethylsilyloxy)cyclohexylcarbamate (660 mg) in toluene (5.4 mL). After 20 min at 0° C., the reaction was quenched with saturated NH4Cl solution and extracted with EtOAc (2×). The organic extracts were combined, washed with brine, dried (MgSO4), filtered, and concentrated. The resulting residue was purified by flash chromatography to afford benzyl (1S,2S,4R)-4 -(tert-butyldimethylsilyloxy)-2-(prop-1-en-2-yl)cyclohexylcarbamate (380 mg). MS found: (M+H)+=404.2.

Provenance & Evidence