Adamantanone → HCID 22948017, compound

Participants

Reaction Conditions

Reaction Steps

Phosphonoate 8 (4.62 g, 14 mmol) and 2-adamantanone (2.58 g, 17 mmol) were dissolved in anhydrous THF (35 ml) under argon and cooled to -68° C. Dropwise addition of lithium diisopropylamide (18.6 mmol) in anhydrous THF (20 ml) at -68° C. generated the ylid, followed by subsequent olefination of the ketone. The reaction was slowly warmed to room temperature over 2 h and then stirred at 75° C. for 1 h. The solution was partitioned between EtOAc/NH4Cl, dried over Na2SO4, evaporated and purified by silica gel chromatography (2% EtOAc/hexanes), yielding 2.5 g (55%) of enol ether 9 as an oil.

Provenance & Evidence