HCID 9944444, compound → HCID 10272449, compound

Participants

Reaction Conditions

Reaction Steps

A −15° C. solution of N-BOC propargyl amine (641 mg, 4.13 mmole, 3.5 eq) in dry THF (12 ml) was treated dropwise with a 1.6M n-BuLi in hexanes solution (5.16 ml, 8.3 mmole, 7.0 eq) and the resulting pale yellow dianion solution stirred at −15° C. for 30 minutes under nitrogen. A dry THF solution (3 ml) of the above-prepared 2,4-Diphenyl-oxazole-5-carboxylic acid methoxy-methyl-amide (365 mg, 1.18 mmole, 1.0 eq) was added dropwise to the dianion solution at −15° C. and the mixture stirred at 0° C. for 2 hours under nitrogen. The mixture was quenched by adding a solution of 2M NaH2PO4 (5 ml), then warmed to room temperature and extracted with ethyl acetate. The organic phase was washed with water and brine then dried over anhydrous sodium sulfate and concentrated in vacuo to give the title compound as a crude brown oil. The crude oil without purification was used immediately in next step.

Provenance & Evidence