3186-86-5Relevant articles and documents
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Kulshreshtha,D.K.
, p. 1783 - 1785 (1977)
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Faparusi,S.I.,Bassir,O.
, p. 3083 - 3084 (1972)
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Preparation and molecular rearrangement of 2α, 3α-epoxy lupan-1-one catalysed by boron trifluoride and by ultraviolet irradiation+
Bose,Chanda
, p. 510 - 514 (2007/10/03)
Using lupeol 7 as lead compound 2α, 3α-epoxy lupan-1-one 11 has been synthesised by a sequence of reactions. Boron trifluoride catalysed molecular rearrangement of 11 in benzene yields 2-formyl-A-nor-lupan-1-one 15 (enolized). Same rearrangement is also achieved in dioxane under photolytic condition.
The synthesis of nor- and bisnorlupanes
Wahhab, Amal,Ottosen, Margaret,Bachelor, Frank W.
, p. 570 - 577 (2007/10/02)
In course of our studies on geochemical biomarkers we required a series of lupane standards.We report here an efficient synthesis of lupane (1) in three steps from betulin (3) in an overall yield of 47.2 percent. 17β(H)-28-Norlupane (2) was obtained in 90
