[O:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[CH:3]=[C:2]1/[CH:10]=[CH:11]/[CH:12]=[C:13](\[O:17][CH3:18])/[C:14]([OH:16])=O.[NH2:19][CH:20]1[CH2:25][C:24]([CH3:27])([CH3:26])[N:23]([CH3:28])[C:22]([CH3:30])([CH3:29])[CH2:21]1.O.ON1C2N=CC=CC=2N=N1.Cl.CN(C)CCCN=C=NCC>CN(C=O)C>[O:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[CH:3]=[C:2]1/[CH:10]=[CH:11]/[CH:12]=[C:13](\[O:17][CH3:18])/[C:14]([NH:19][CH:20]1[CH2:21][C:22]([CH3:29])([CH3:30])[N:23]([CH3:28])[C:24]([CH3:27])([CH3:26])[CH2:25]1)=[O:16]A solution of (2Z,4E)-5-(benzofuran-2-yl)-2-methoxy-2,4-pentadienoic acid (122 mg, 0.5 mmol), 4-amino-1,2,2,6,6-pentamethylpiperidine (85 mg, 0.5 mmol), 1-hydroxy-7-azabenzotriazole hydrate (65 mg, 0.5 mmol) and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (95 mg, 0.5 mmol) in DMF (2 ml) was stirred at RT overnight. After the same work-up described in example 3 the residue was triturated with isopropyl ether to produce a solid that was recovered and dried to give pure title compound (85 mg, 0.214 mmol, yield 42.8%) as yellow crystals, m.p.=152°.
Wird geladen…