Enantioselective Synthesis of Cuparane Sesquiterpenes. Synthesis of (−)-Cuparene and (−)-δ-Cuparenol
作者:Antonio Abad、Consuelo Agulló、Manuel Arnó、Ana C. Cuñat、M. Teresa García、Ramón. J. Zaragozá
DOI:10.1021/jo960463g
日期:1996.1.1
(-)-Cuparene land (-)-delta-cuparenol, two cuparane-type sesquiterpenoids, were synthesized from beta-cyclogeraniol in 47% and 27% overall yield, respectively, using a Katsuki-Sharpless asymmetric epoxidation, a pinacollic rearrangement, and a Robinson annulation as key synthetic steps.
On the configuration and occurrence of 2,6-cyclocuparan-3-ols: Resolving a lasting discrepancy
作者:Dragan B. Zlatković、Miljana R. Đorđević Zlatković、Niko S. Radulović
DOI:10.1016/j.phytochem.2022.113566
日期:2023.3
major volatiles of several liverwort species. Conflicting reports on the structures of these cyclocuparanols can be found in the literature–different research groups assigned the same spectral data to different structures, yet these inconsistencies were never addressed, let alone satisfactorily explained. Following the isolation of all four diastereoisomeric cyclocuparanols from Marchantia polymorpha,
Sesquiterpene Synthases Cop4 and Cop6 from Coprinus cinereus: Catalytic Promiscuity and Cyclization of Farnesyl Pyrophosphate Geometric Isomers
作者:Fernando Lopez-Gallego、Sean A. Agger、Daniel Abate-Pella、Mark D. Distefano、Claudia Schmidt-Dannert
DOI:10.1002/cbic.200900671
日期:——
Cyclization of FPP: Two new fungal sesquiterpene synthase are described that have opposite catalytic fidelities in the cyclization of farnesyl diphosphate. Catalytic promiscuity can be drastically reduced by changing the conditions of the reaction. Conversion of the FPP geometricisomers was found to proceed via opposite enantiomers of a cyclic carbocation intermediate that are rearranged to different