Water → HCID 66780212, compound

Participants

Reaction Steps

2-[4-[2-(3,4,5-trimethoxyphenyl)furo[3,2-b]pyridin-7-yl]pyrazol-1-yl]acetic acid (0.040 mmol) is dissolved in THF and thionylchloride (0.234 mmol) is added. The mixture is stirred 24 h at RT. Additional thionylchloride (0.234 mmol) is added and the reaction is stirred 24 h at RT. Additional Thionylchlorid (2.343 mmol) is added and the reaction is stirred 48 h. The solvent is removed in vacuo and ammonium hydroxide (32%, 1.205 mmol) is added. Water (3 ml) is added and the precipitate is filtered and resuspended in MeOH and filtered and dried at 50° C. in vacuo. The product is isolated as beige solid in a yield of 92%). HPLC (method A): Rt 2.40 min (purity 95%); LCMS (ESI+) (method E): Rt 1.49 min, M+H+ 409.1 m/z; 1H NMR (500 MHz, DMSO-d6) δ [ppm] 8.67 (s, 1H), 8.45 (d, J=4.4, 1H), 8.32 (s, 1H), 7.75-7.51 (m, 3H), 7.47-7.26 (m, 3H), 4.93 (s, 2H), 3.95 (s, 6H), 3.74 (s, 3H).

Provenance & Evidence