Secoorthosiphols A–C: three highly oxygenated secoisopimarane-type diterpenes from Orthosiphon stamineus

Autor: Suresh Awale, Kazuhiko Taira, Shigetoshi Kadota, Seikichi Shimoji, Yasuhiro Tezuka
Rok vydání: 2002
Předmět:
Zdroj: Tetrahedron Letters. 43:1473-1475
ISSN: 0040-4039
Popis: Three new highly oxygenated 2,3-secoisopimarane-type diterpenes, named secoorthosiphols A (1), B (2) and C (3), have been isolated as extremely minor constituents from the aerial parts of the Orthosiphon stamineus from Okinawa. A unique unprecedented structural feature of such a ring A opened system in newly isolated compounds was encountered for the first time in isopimarane-type diterpenes. Secoorthosiphol C (3) represents the first example of a biogenetically unique and unconventional secoisopimarane-type diterpene having a cyano group.
Databáze: OpenAIRE