Drüsenfarbstoffe aus Labiaten: Die polaren Diterpenoide aus  Plectranthus argentatus  S. T. B LAKE | Zendy

Alder Alfredo Carlos | Zendy; Rüdi Peter | Zendy; Eugster Hans | Zendy

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Drüsenfarbstoffe aus Labiaten: Die polaren Diterpenoide aus Plectranthus argentatus S. T. B LAKE

Author(s) -

Alder Alfredo Carlos,

Rüdi Peter,

Eugster Hans

Publication year - 1984

Publication title -

helvetica chimica acta

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.74

H-Index - 82

eISSN - 1522-2675

pISSN - 0018-019X

DOI - 10.1002/hlca.19840670616

Subject(s) - chemistry , plectranthus , coleus , stereochemistry , botany , biology , lamiaceae

Polar Diterpenoids from Leaf‐Glands of Plectranthus argentatus S. T. B LAKE From the red leaf‐glands of the Australian Plectranthus argentatus the following novel diterpenoids were isolated: coleon‐U‐quinone ( 1 ), 8α,9α‐epoxycoleon‐U‐quinone ( 3 ), 6β‐formyloxy‐7α‐hydroxyroyleanone ( 7 ), and 5,6‐dihydrocoleon U ( 10 ), besides the already known compounds 6β, 7α‐dihydroxyroyleanone ( 4 ), 7α‐acetoxy‐6β‐hydroxyroyleanone ( 5 ), and 7α‐formyloxy‐6β‐hydroxyroyleanone ( 6 ). Epoxydation of 1 by perborate led in 32% yield to the epoxyquinone 3 .

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