[CH3:1][C:2]([O:4][C@H:5]1[C:14]2[C@@:15]3([CH3:30])[C@@H:26]([CH2:27][O:28][CH3:29])[O:25][C:23](=[O:24])[C:17]4=[CH:18][O:19][C:20]([C:21](=[O:22])[C:13]=2[C@@H:8]2[CH2:9][CH2:10][C@H:11]([OH:12])[C@@:7]2([CH3:31])[CH2:6]1)=[C:16]34)=[O:3].[NH:32]1[CH2:37][CH2:36][CH2:35][CH2:34][CH2:33]1>C(Cl)Cl>[C:2]([O:4][C@H:5]1[C:14]2[C@:15]3([CH3:30])[C:16](/[C:17](=[CH:18]\[N:32]4[CH2:37][CH2:36][CH2:35][CH2:34][CH2:33]4)/[C:23](=[O:24])[O:25][C@@H:26]3[CH2:27][O:28][CH3:29])=[C:20]([OH:19])[C:21](=[O:22])[C:13]=2[CH:8]2[C@@:7]([CH3:31])([C@@H:11]([OH:12])[CH2:10][CH2:9]2)[CH2:6]1)(=[O:3])[CH3:1]To a solution of 50 mg (0.12 mmol) 17-hydroxywortmannin in 0.5 mL CH2Cl2 is added 20.4 mg (0.24 mmol) piperidine. The reaction mixture is stirred at room temperature overnight. CH2Cl2 is removed in vacuo. The residue is triturated with Et2O to give 33 mg (53.3%) product as an orange powder. MS (ESI) m/z 516.25 (M+1).
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