Toluene → HCID 86607516, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 4,7-dihydroxy-thieno[2,3-c]pyridine-5-carboxylic acid butyl ester (267 mg, 1 mmol), POCl3 (217 mg, 1.4 mmol), and toluene (4 ml) was heated in a microwave oven at 140° C. for 15 min. The same procedure was repeated with a second batch. Both batches were combined, conc. aqueous NaHCO3 (40 ml) and EtOAc (40 ml) were added and the mixture was stirred vigorously for 45 min. The organic layer was then separated, dried over MgSO4 and concentrated in vacuo to give a tan solid (410 mg). Purification by flash column chromatography on silica gel using CH2Cl2: EtOAc=9:1 as the eluent yielded the title compound as a tan solid (297 mg, first major fraction). MS-(−)-ion: M−1=284.3.

Provenance & Evidence