HCID 19912860, compound → HCID 21964441, compound

Participants

Reaction Conditions

Reaction Steps

A solution of crude 9-3 (8.77 g) in THF (100 mL) was added to a solution of ethynylmagnesium bromide (450 mL, 225 mmol, 0.5 M/THF) at 0° C. by cannula. The mixture was stirred for 1 h at 0° C. and for 1 h at room temperature. The reaction was then quenched by addition of 200 mL saturated NH4Cl solution. The layers were separated and the aqueous layer was extracted with ethyl acetate (3×200 mL). The combined organic solution was washed with brine and then was dried (Na2SO4), filtered and evaporated. Purification by flash chromatography on silica gel (10% 20% ethyl acetate/hexanes) gave 8-4 (7.67 g, 37.9 mmol, 84% from 9-2).

Provenance & Evidence