(20R,23E)-Eupha-8,23-diene-3β,25-diol from Tripetalum cymosum
作者:Yuan-Wah Leong、Leslie J Harrison
DOI:10.1016/s0031-9422(98)00565-2
日期:1999.3
A new euphane triterpenoid, (20R,23E)-eupha-8,23-diene-3 beta,25-diol, was isolated from the leaves of Tripetalum cymosum and its structure was determined by spectral analysis and chemical correlation with euphol. Caryophyllene oxide, friedelin, euphol and putranjivic acid were also obtained from the leaves whilst the bark afforded euphol, glutin-5-en-3 beta-ol, butyrospermol and dammara-20,24-dien-3 beta-ol. (C) 1999 Elsevier Science Ltd. All rights reserved.
Terpenoids and related compounds—XXI
作者:P. Sengupta、A.K. Dey
DOI:10.1016/s0040-4020(01)93555-0
日期:1972.1
The structures IIIa and IVa suggested for putranjic and putranjivic acids respectively have been confirmed by the synthesis of methyl putranjivate (IVb) from friedel-3-ene (IX). Putranjic acid has been shown to have S-configuration (IIIa) at C2.