Keitaro Aota

Structure and absolute configuration of α-rotunol and β-rotunol, sesquiterpenoids of Cyperus rotundus☆

Abstract Two novel sesquiterpenic keto-alcohols, α-rotunol and β-rotunol, have been isolated from nutgrass, Cyperus rotundus ;Cyperaceae). The stereostructure II of β-rotunol is based on spectral properties and by transformation to the dienone (V) which has also been derived from hinesol (VI). α-Rotunol has been given the stereostructure I based on its physico-chemical properties.

4α,5α-Oxidoeudesm-11-en-3α-ol, sesquiterpenoid of Cyperus rotundus☆

Abstract A novel sesquiterpenic oxido-alcohol has been isolated from the rhizomes of Cyperus rotundus and identified as 4α-5α-oxidoeudesm-11-en-3α-ol.

Identification of ketones inCyperus

Abstract A ketone isolated fromCyperus scarosius and isopatchoulenone (cyperenone) fromC. scariosus have been identified as cyperotundone fromC. rotundus. C. articulatus has also been shown tocontain cyperotundone. Confusion in the previous report about the constituents ofC. articulatus is clarified.