Picolinic acid → HCID 21256696, compound

Participants

Reaction Steps

To a stirred solution of 1,3-phenylenediamine dihydrochloride (183 mg, 1.00 mmol) in DMF (10 mL) was added iPr2NEt (2.10 mL, 12.1 mmol), HOBt (407 mg, 3.00 mmol), picolinic acid (370 mg, 3.00 mmol), and BOP reagent (1.34 g, 3.00 mmol) in sequential fashion. After 18 h at room temperature, the reaction mixture was added to a rapidly-stirred mixture of EtOAc (50 mL), H2O (50 mL), and sat'd NaCl (50 mL). After stirring for ca 1 h, the phases were separated and the aqueous layer was extracted with EtOAc (50 mL). The combined organic layers were dried over MgSO4, filtered, and concentrated in vacuo to a brown oil. Purification by flash chromatography (silica gel, EtOAc) afforded 251 mg (78%) of the desired product as a white solid. MS (ES+) m/z 319.0 [M+H]+.

Provenance & Evidence