1,2-Dichloroethane → HCID 53248107, compound

Participants

Reaction Steps

4-(2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)-3-sulfobutanoic acid (110 mg, 0.418 mmol), EDC (240 mg, 1.25 mmol) and N-hydroxysuccinimide (58 mg, 0.504 mmol) was stirred in 10 ml of DMA for overnight, evaporated and purified on SiO2 chromatography eluted with CH3OH/CH2Cl2/HAc (100:900:1 to 100:600:1) to afford 112 mg (75%) of the title product. 1H NMR (DMF-d7) 6.93 (s, 2H), 4.06 (dd, 1H, J=4.8, 13.1 Hz), 3.80 (dd, 1H, J=10.7, 13.9 Hz), 3.35 (dd, 1H J=3.3, 17.8 Hz), 3.25 (m, 1H), 3.10 (dd, 1H, J=2.2, 16.4 Hz), 2.87 (m, 4H); 13C NMR 172.27, 170.88, 169.29, 135.55, 55.28, 40.22, 32.69, 26.66; ESI MS m/z−261.70 (M−H).

Provenance & Evidence