Glycolic Acid → N-(3-{4-[5-(5-ethyl-thiophen-2-yl)-[1,2,4]oxadiazol-3-yl]-2,6-dimethyl-phenoxy}-2-hydroxy-propyl)-2-hydroxy-acetamide

Participants

Reaction Steps

To a cold solution (0° C.) of 1-amino-3-{4-[5-(5-ethyl-thiophen-2-yl)-[1,2,4]oxadiazol-3-yl]-2,6-dimethyl-phenoxy}-propan-2-ol (32 mg, 86 μmol) in DCM (1 mL), DIPEA (45 mg, 345 μmol), glycolic acid (13 mg, 172 μmol) and finally TBTU (33 mg, 101 μmol) is added. The mixture is stirred at rt for 1 h before it is diluted with EA and washed with water. The aq. phase is extracted back with EA. The combined org. extracts are dried over MgSO4, filtered and evaporated. The crude product is purified by crystallisation from acetonitrile to give N-(3-{4-[5-(5-ethyl-thiophen-2-yl)-[1,2,4]oxadiazol-3-yl]-2,6-dimethyl-phenoxy}-2-hydroxy-propyl)-2-hydroxy-acetamide (7 mg) as a white solid; LC-MS: tR=0.95 min, [M+1]+=432.16.

Provenance & Evidence