[CH:1]1([S:4]([NH:7][C:8]([C:10]2([NH:15][C:16]([CH:18]3[CH2:22][CH:21]([O:23][C:24]4[CH:29]=[CH:28][N:27]=[C:26](Cl)[N:25]=4)[CH2:20][CH:19]3[C:31]([N:33]([CH2:35][CH2:36][CH2:37][CH2:38][CH:39]=C)[CH3:34])=[O:32])=[O:17])[CH2:12][CH:11]2[CH:13]=C)=[O:9])(=[O:6])=[O:5])[CH2:3][CH2:2]1.[CH:41]([NH2:44])([CH3:43])[CH3:42]>C1COCC1.ClCCCl>[CH:41]([NH:44][C:26]1[N:25]=[C:24]([O:23][CH:21]2[CH2:22][CH:18]3[CH:19]([C:31](=[O:32])[N:33]([CH3:34])[CH2:35][CH2:36][CH2:37][CH2:38][CH:39]=[CH:13][CH:11]4[C:10]([C:8]([NH:7][S:4]([CH:1]5[CH2:3][CH2:2]5)(=[O:6])=[O:5])=[O:9])([NH:15][C:16]3=[O:17])[CH2:12]4)[CH2:20]2)[CH:29]=[CH:28][N:27]=1)([CH3:43])[CH3:42]Compound 10f (30 mg, 0.05 mmol) and isopropylamine (excess) in THF (10 ml) was heated in a microwave oven at 110° C. for 30 min and then left at ambient temperature for 16 hrs. The solvent was stripped of and the residue was redissolved in DCE (15 ml) and degassed with nitrogen. Hoyeda-Grubbs II catalyst (7 mg) was added and the mixture was heated in a microwave oven at 150° C. for 10 min. The mixture was concentrated to dryness and purified by prep. HPLC-MS-UV which gave the pure title compound (3.1 mg), (M+H)+=589.2.
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