Herein we report the first total synthesis of catenioblin B (1) via a titanium(IV) mediated regioselective epoxide ring-opening, Grignard reaction, Luche's reduction and TEMPO/BAIB mediated intramolecular cyclization as the key steps. (C) 2014 Elsevier Ltd. All rights reserved.
With bioactivity-guided phenotype screenings, a potent anti-inflammatory compound f152A1 has been isolated, characterized and identified as the known natural product LL-Z1640-2. Metabolic instability precluded its use for the study on animal disease models. Via total synthesis, a potent, metabolicallystabilized analog ER-803064 has been created; addition of the (S)-Me group at C4 onto f152A1 has resulted