74523-79-8Relevant academic research and scientific papers
Migrated Lupane Derivatives. Boron Trifluoride Etherate-catalyzed Backbone Rearrangement of 3α,4α- and 3β,4β-Epoxy-D:A-friedo-18β,19αH-lupanes and Solvent Effects
Yokoyama, Yasushi,Moriyama, Yoshihiko,Tsuyuki, Takahiko,Takahashi, Takeyoshi
, p. 234 - 239 (2007/10/02)
Backbone rearrangements of 3α,4α- and 3β,4β-epoxy-D:A-friedo-18β,19αH-lupanes catalyzed by boron trifluoride etherate gave 18β,19αH-lup-12-en-3-ols, lup-18-en-3-ols, and lup-19-en-3-ols besides known D:B-friedo-18β,19αH-lup-5-en-3-ols and -5(10)-en-3-ols.D:B-Friedo-18β,19αH-lup-1(10)-en-3α-ol and 3β,10β-epoxy-D:B-friedo-18β,19αH-lupane were also obtained from α- and β-epoxides, respectively.Solvent effects on these reactions were examined.
COMPOSITE CONSTITUENTS: FOUR NEW TRITERPENOIDS, NEOLUPENOL, TAROLUPENOL AND THEIR ACETATES ISOLATED FROM ROOTS OF A JAPANESE DANDELION, TARAXACUM JAPONICUM
Ageta, H.,Shiojima, K.,Masuda, K.,Lin, T.
, p. 2289 - 2290 (2007/10/02)
Neolupenyl acetate (Ia), tarolupenyl acetate (IIa) and their corresponding alcohols (Ib and IIb) were isolated from the roots of Taraxacum japonicum, and their structures were established as the members of migrated lupane series.
BORON TRIFLUORIDE ETHERATE-CATALYZED BACKBONE REARRANGEMENT OF 3α,4α- AND 3β,4β-EPOXY-D:A-FRIEDO-18β,19αH-LUPANES
Yokoyama, Yasushi,Moriyama, Yoshihiko,Tsuyuki, Takahiko,Takahashi, Takeyoshi
, p. 67 - 70 (2007/10/02)
Treatment of 3α,4α- and 3β,4β-epoxy-D:A-friedo-18β,19αH-lupanes with boron trifuoride etherate gave migrated lupane derivatives, D:B-friedo-18β,19αH-lup-5- and -5(10)-en-3-ols, 18β,19αH-lup-12-en-3-ols, lup-18-en-3-ols, and lup-19-en-3-ols.D:B-Friedo-18β,19αH-lup-1(10)-en-3α-ol and 3β,10β-epoxy-D:B-friedo-18β,19αH-lupane were also obtained from α- and β-epoxydes, respectively.The reaction product ratios in the same reaction in various solvents are listed in Tables.
