Potassium Carbonate → HCID 67173612, compound

Participants

Reaction Steps

To a mixture of ethyl 7-(4-bromophenyl)-4,7-dioxoheptanoate ((36A, where Ar1-Br=4-bromophenyl, also see compound 5B, Scheme 5) (1.50 g, 4.4 mmol) and oxazolidin-2-one (575 mg, 6.6 mmol) in dioxane (5 mL) were added L-proline (50 mg, 0.44 mmol), CuI (42 mg, 0.22 mmol) and K2CO3 (1.22 g, 8.8 mmol). The resultant mixture was stirred under N2 at 110° C. for 48 h and then evaporated. The residue was diluted with EA/water (40 mL/40 mL). The mixture was filtered and the resultant aqueous layer was extracted with EA (30 mL×5). The combined organic layers were washed with brine, dried over NaSO4, concentrated and purified by silica gel column chromatography (pure DCM to DCM:MeOH=30:1) to afford titled compound as a white solid (158 mg, yield 10%).

Provenance & Evidence