The Terpenoids of Maytenus boaria MOL. (Celastraceae)

Abstract

The known triterpenoids β‐amyrin (= olean‐12‐en‐3β‐ol; 22), lupeol (= lup‐20(29)‐en‐3β‐ol; 17), betulin (= lup‐20(29)‐ene‐3β,28‐diol; 18), lup‐20(29)‐ene‐3β,30‐diol (20), oleanolic acid (= 3β‐hydroxyolean‐12‐en‐28‐oic acid; 21), and betulonic acid (= 3‐oxolup‐20(29)‐en‐28‐oic acid; 19), together with epicatechol (= cis‐2‐(3,4‐dihydroxyphenyl)‐3,4‐dihydro‐2H‐1‐benzopyran‐3,5,7‐triol; 23), 5′‐O‐methylgallocatechol (= trans‐2‐(3,4‐dihydroxy‐5‐methoxyphenyl)‐3,4‐dihydro‐2H‐1‐benzopyran‐3,5,7‐triol; 24), and 4‐hydroxybenzaldehyde were isolated from the aerial parts of Maytenus boaria (MOL.). Additonally, the eight 4,C4‐dihydro‐β‐agarofuran sesquiterpenoids 1–8, one of them a diol with a (4R)‐configuration, and compound 9 were present in the extract. The structures of these compounds were established by spectroscopic and chemical means. Copyright © 1993 Verlag GmbH & Co. KGaA, Weinheim