Triethylamine → HCID 11966734, compound

Participants

Reaction Steps

Embodiment a: A solution of diphenylmethyl 2-[(3R,4R)-4-(p-toluenesulfonylthio)-3-phenoxyacetamido-2-oxo-azetidin-1-yl]-3-trifluoromethanesulfonyloxy-2-butenoate (XXa, 0.300 g, 0.00036 mole) in dry tetrahydrofuran (3 mL) was treated with triethylamine (0.077 mL, 0.00036 mole) for 1 h at room temperature. Reverse-phase chromatography (C-18 column, eluting with 65% acetonitrile--35% of 0.01M phosphate pH 6.5 buffer) showed complete consumption of the starting material after 45 min with formation of a single, faster-eluting product. 0.05M sulfuric acid and ethyl acetate was added to the reaction mixture, followed by separating the two phases. The organic phase was dried with sodium sulfate and evaporated to give diphenylmethyl 2-[(3R,4R)-4-(p-toluenesulfonylthio)-3-phenoxyacetamido-2-oxo-azetidin-1-yl]-2,3-butadienoate (Ia) as a colorless foam (0.245 g, quantitative).

Provenance & Evidence