18671-50-6Relevant academic research and scientific papers
Molecular rearrangement of 3β,4β-epoxy-D:A-friedoolean-7-one
Datta, S. K.,Ghosh, S. K.,Majumdar, K.,Das, Saktipada
, p. 960 - 963 (2007/10/03)
3β,4β-Epoxy-D:A-friedoolean-7-one (7) on treatment with boron trifluoride etherate in benzene affords D:A-friedoolean-3,7-dione (8), 3β-hydroxy-D:B-friedoolean-5(10)-en-7-one (11) and 3β-hydroxy-D:B-friedoolean-5-en-7-one (14).On reaction with dry hydrogen chloride 7 rearranges to 8.
Reductive Ring-opening of Triterpenoid Epoxides with Lithium and Ethylenediamine
Sengupta, Pasupati,Das, Kanchan,Das, Saktipada
, p. 1175 - 1177 (2007/10/02)
The reactions of lithium and ethylenediamine with 3α,4α-(I, III) and 3β,4β-epoxides (VIII, IX) of friedel-3-ene afford the hydroxy derivatives via epoxide ring-opening.
Terpenoids and Related Compounds: Part XIX -3β-Hydroxyfriedelan-7-one, a New Triterpene from Pergularia extensa N.E.Br.
Talapatra, Bani,Basak, Amit,Goswami, Shyamaprasad,Talapatra, Sunil K.
, p. 249 - 250 (2007/10/02)
A new triterpene ketol (I) has been isolated from the leaves of Pergularia extensa N.E.Br. (fam.Asclepiadaceae) along with four known triterpenes, viz. lupeol, lupeol acetate, oleanolic acid, putranjivadione, and β-sitosterol.The compound (I) has been shown to have 3β-hydroxyfriedelan-7-one structure on the basis of its spectral evidence and chemical studies.
