Diisopropylamine → HCID 9953666, compound

Participants

Reaction Conditions

Reaction Steps

To a distilled THF solution (30 ml) at -78° C. under a nitrogen atmosphere containing diisopropylamine (1.13 ml, 8.032 mmol distilled from sodium metal) was added butyllithium (BuLi) (8.032 mmol). The solution was allowed to warm to approximately -25° C., recooled to -78° C. and stirred for 1 hour. The lithium diisopropylamide (LDA) solution was added (via cannula) to a separate flask containing 3-pyridin4-yl-2-pyridin-4-ylmethyl-propionic acid ethyl ester (2.056 g, 8.032 mmol) in THF (30 ml) at -78° C. The red mixture was allowed to warm to approx. -25° C., recooled to -78° C., and stirred for 1 hour. To this lithium enolate solution was added (via cannula) a solution of N-adamantan-1-yl-2-bromo-acetamide (2.186 g, 8.032 mmol) in THF (10 ml) at -78° C. The mixture was kept at -78° C. for 16 hours, warmed to ambient temperature and stirred for two additional hours. The mixture was quenched with EtOAc, washed with an equal volume of H2O and brine, dried (Na2SO4) and concentrated in vacuo to a brown oil. The crude mixture was chromatographed on silica gel (1:1 acetone:hexane) to afford 475 mg (14%) of the title compound as a white solid, which was recrystallized from isopropyl ether, mp 137°-138.5° C.

Provenance & Evidence