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- W1993329857 abstract "Directed Functionalization of the Pimarane Skeleton, II. — Formation of the D-Ring for the Synthesis of Higher TerpenesThe conversion of the pimarane skeleton 1 into the tetracyclic compound 3 is described. The synthetic route includes the formation of the D-ring and the stereoselective introduction of an angular methyl group at C-14. D-ring construction has been achieved by selective oxidation of the double bond systems of 2 which lead via 14 to compound 18. This was alkylated to 19 and subsequently converted into 20. Further oxidation gave 21 and the ester 24 which upon treatment with potassium tert-butoxide formed 25. The angular methyl group was introduced using a organocopper ragent: 26. After decarboxylation and hydrogenation 3 was obtained. It can be used as building unit for the construction of higher terpenes (e.g., tirucallanes 4)." @default.
- W1993329857 created "2016-06-24" @default.
- W1993329857 creator A5017668614 @default.
- W1993329857 creator A5036604197 @default.
- W1993329857 date "1992-10-12" @default.
- W1993329857 modified "2023-09-23" @default.
- W1993329857 title "Gezielte Funktionalisierung des Pimarangerüstes, II. Aufbau des D-Ringes zur Synthese höherer Terpene" @default.
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- W1993329857 doi "https://doi.org/10.1002/jlac.1992199201168" @default.
- W1993329857 hasPublicationYear "1992" @default.
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