[C:1]([NH:24][CH:25]([CH3:35])[CH2:26][NH:27]C(=O)OC(C)(C)C)(=[O:23])[CH2:2][CH2:3]/[CH:4]=[CH:5]\[CH2:6]/[CH:7]=[CH:8]\[CH2:9]/[CH:10]=[CH:11]\[CH2:12]/[CH:13]=[CH:14]\[CH2:15]/[CH:16]=[CH:17]\[CH2:18]/[CH:19]=[CH:20]\[CH2:21][CH3:22].C(O)(C(F)(F)F)=O.C([O-])([O-])=O.[Na+].[Na+]>C(Cl)Cl>[NH2:27][CH2:26][CH:25]([NH:24][C:1](=[O:23])[CH2:2][CH2:3]/[CH:4]=[CH:5]\[CH2:6]/[CH:7]=[CH:8]\[CH2:9]/[CH:10]=[CH:11]\[CH2:12]/[CH:13]=[CH:14]\[CH2:15]/[CH:16]=[CH:17]\[CH2:18]/[CH:19]=[CH:20]\[CH2:21][CH3:22])[CH3:35]To a solution of tert-butyl 2-(4Z,7Z,10Z,13Z,16Z,19Z)-docosa-4,7,10,13,16,19-hexaenamidopropylcarbamate (2.10 g, 4.34 mmol) in DCM (100 mL) at 0° C. was slowly added TFA (30 mL). The mixture was stirred (0° C., 2 h), warmed to RT and stirred (16 h). The mixture was basified to pH 10 with saturated aqueous Na2CO3 and extracted with EtOAc (2×200 mL). The combined organic layers were dried over MgSO4, filtered and concentrated under reduced pressure to afford (4Z,7Z,10Z,13Z,16Z,19Z)—N-(1-aminopropan-2-yl)-docosa-4,7,10,13,16,19-hexaenamide (1.60 g, 98%) as a light yellow oil. Mass calculated for C25H40N2O=384.6; found: [M+H]+=385.2.
Loading…