2-Thiophenecarboxylic acid, 3-(chlorosulfonyl)-, methyl ester → HCID 136358508, compound

Participants

Reaction Conditions

Reaction Steps

To the product of Example 205 (0.020 g, 0.047 mmol) in pyridine (0.2 mL) was added 2-(methoxylcarbonyl)thiophene-3-sulfonyl chloride (0.014 g, 0.056 mmol). The reaction mixture was heated in a microwave reactor at 1001C for 30 minutes. The reaction was cooled to 25° C., diluted with ethyl acetate (40 mL), washed with water and brine. The organic layer was dried over magnesium sulfate, filtered and concentrated. The residue was chromatographed on silica gel eluting with 99:1 dichloromethane/methanol to give the title compound (15 mg, 50%). 1H NMR (300 MHz, DMSO-d6) δ 0.97 (d, J=6.25 Hz, 6 H) 1.56 (m, 2 H) 1.69 (m, 1 H) 3.89 (s, 3 H) 4.46 (m, 2 H) 7.50 (m, 4 H) 7.65 (d, J=8.82 Hz, 1 H) 8.01 (d, J=5.15 Hz, 1 H) 8.54 (dd, J=7.91, 1.65 Hz, 1 H) 8.88 (dd, J=4.60, 1.65 Hz, 1 H) 10.74 (s, 1 H) 14.06 (s, 1 H). MS (ESI−) m/z 630 (M−H)−.

Provenance & Evidence