Cafestol to Tricalysiolide B and Oxidized Analogues: Biosynthetic and Derivatization Studies Using Non-heme Iron Catalyst Fe(PDP)
摘要:
The tricalysiolides are a recently isolated class of diterpene natural products featuring the carbon backbone of the wellknown coffee extract, cafestol. Herein we validate the use of our non-heme iron complex, Fe(PDP), as an oxidative tailoring enzyme mimic to test the proposal that this class of natural products derives from cafestol via cytochrome P-450-mediated furan oxidation. Thereafter, as predicted by computational analysis, C-H oxidation derivatization studies provided a novel 2 degrees alcohol product as a single diastereomer.
Catalyst-Controlled Aliphatic C–H Oxidations with a Predictive Model for Site-Selectivity
作者:Paul E. Gormisky、M. Christina White
DOI:10.1021/ja407388y
日期:2013.9.25
Selective aliphaticC-H bond oxidations may have a profound impact on synthesis because these bonds exist across all classes of organic molecules. Central to this goal are catalysts with broad substrate scope (small-molecule-like) that predictably enhance or overturn the substrate's inherent reactivity preference for oxidation (enzyme-like). We report a simple small-molecule, non-heme iron catalyst that