HCID 16102691, compound → HCID 178470120, compound

Participants

Reaction Conditions

Reaction Steps

Anhydrous sodium hydrogen sulfide (Alfa Aesar, 53.3 mg, 0.95 mmol) is added in one portion to a solution of dimethylformamide (4.0 mL) containing 16 (158.1 mg, 0.37 mmol) at room temperature. The resulting solution is heated at 50° C. for 1 h and allowed to cool to room temperature. The reaction mixture is quenched by addition of a 5% aqueous solution of hydrochloric acid (50 mL) and extracted with ethyl acetate (100 mL). The organic extract is washed with brine (50 mL) and evaporated to dryness under reduced pressure to give crude ethyl 7-bromo-1-cyclopropyl-2-mercapto-8-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylate. Rf 0 (ethyl acetate). LCMS m/z calcd for C16H1679BrNO4S ([M]+) 397. Found 398 ([M+H]+).

Provenance & Evidence