[N:1]12[CH2:8][CH2:7][CH:4]([CH2:5][CH2:6]1)[C@@H:3]([O:9][C:10](=[O:23])[C:11]([OH:22])([C:17]1[S:18][CH:19]=[CH:20][CH:21]=1)[C:12]1[S:13][CH:14]=[CH:15][CH:16]=1)[CH2:2]2.[C:24]([NH:31][CH2:32][CH2:33][CH2:34][Br:35])([O:26][C:27]([CH3:30])([CH3:29])[CH3:28])=[O:25]>CN(C=O)C>[Br-:35].[C:27]([O:26][C:24]([NH:31][CH2:32][CH2:33][CH2:34][N+:1]12[CH2:8][CH2:7][CH:4]([CH2:5][CH2:6]1)[C@@H:3]([O:9][C:10](=[O:23])[C:11]([OH:22])([C:12]1[S:13][CH:14]=[CH:15][CH:16]=1)[C:17]1[S:18][CH:19]=[CH:20][CH:21]=1)[CH2:2]2)=[O:25])([CH3:30])([CH3:29])[CH3:28]Hydroxy-di-thiophen-2-yl-acetic acid (R)-(1-aza-bicyclo[2.2.2]oct-3-yl) ester (0.758 g, 2.17 mmol) and 3(BOC-amino) propylbromide (0.775 g, 3.25 mmol) are dissolved in DMF (7 ml) and heated at 60° C. for 2.5 hours. The solvent is removed in vacuo and purification of the crude residue by chromatography on C18 silica, eluting with water:acetonitrile affords the titled compound as an oil.
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