Title of article :
19-nor-11-Oxooleanan-12-ene and 18,19-seco-19-oxours-11,13(18)-diene triterpenes from Diospyros decandra bark
Author/Authors :
Sutthivaiyakit، نويسنده , , Somyote and Seeka، نويسنده , , Chonticha and Kritwinyu، نويسنده , , Thanasarn and Pisutchareonpong، نويسنده , , Somchai and Chimnoi، نويسنده , , Nittirat، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2012
Abstract :
Four new triterpenes, 2α,3β-dihydroxy-19-nor-11-oxo-20-dimethylurs-12-en-24,28-dioic acid (equivalent to 2α,3β-dihydroxy-19-nor-11-oxoolean-12-en-24,28-dioic acid), 2α,3β-dihydroxy-18,19-seco-19-oxours-11,13(18)-dien-24,28-dioic acid, 2α,3β,19α-trihydroxy-11-oxours-12-en-24,28-dioic acid and 2α,3β,19α-trihydroxy-28-1′-β-d-[glucopyranosyl-(1″→6′)-glucopyranosyl]-urs-12-en-24,28-dioic acid were isolated from the methanol extract of the bark of Diospyros decandra as their acetate-methyl ester derivatives. The first two compounds represent the biosynthetic transformation products of 2α,3β,19-trihydroxyurs-24,28-dioic acid via oxidative rearrangement of ring E.
Keywords :
Ebenaceae , 18 , 19-seco-19-Oxoursane triterpene , 19-nor-11-Oxooleanan-12-ene , Oxidative rearrangement , Diospyros decandra , 19-Hydroxyursane
Journal title :
Tetrahedron Letters
Journal title :
Tetrahedron Letters
