Substrate Specificity for the Epoxidation of Terpenoids and Active Site Topology of House Fly Cytochrome P450 6A1
作者:John F. Andersen、Jennifer K. Walding、Philip H. Evans、William S. Bowers、René Feyereisen
DOI:10.1021/tx9601162
日期:1997.2.1
methoprene. The four geometric isomers of methyl farnesoate were metabolized predominantly to the 10,11-epoxides, but also the 6,7-epoxides and to the diepoxides. The 10,11-epoxide of methyl (2E,6E)-farnesoate was produced in a 3:1 ratio of the (10S) and (10R) enantiomers. Monoepoxides of methyl farnesoate were metabolized efficiently to the diepoxides. Methyl farnesoate epoxidation was strongly inhibited
Rapid and Enantioselective Synthetic Approaches to Germanicol and Other Pentacyclic Triterpenes
作者:Karavadhi Surendra、E. J. Corey
DOI:10.1021/ja802730a
日期:2008.7.1
routes to the key intermediate 2 for the synthesis of the pentacyclic triterpene germanicol 1 have been developed. In the first, the ( S)-epoxide of farnesyl bromide is transformed in just three steps to the tetracyclic intermediate 7, which is converted to chiral 2 by treatment with polyphosphoric acid. The second synthetic route to 2 involves the coupling of the ( S)-epoxide 8 with vinyl iodide 9 to give