13878-90-5Relevant academic research and scientific papers
Reactions of Triterpenes: Part III - Partial Synthesis of 3β-Hydroxycycloart-24-en-26-al from Cycloart-24-ene-3β,26-diol
Anjaneyulu, V.,Prasad, K. Harischandra
, p. 1075 - 1076 (2007/10/02)
Oxidation of cycloart-24-ene-3β,26-diol (I) with DDQ or Ag2CO3/SiO2 in dry benzene gives only 3β-hydroxycycloart-24-en-26-al (II) whereas CrO3/pyridine oxidation of I yields II, mangiferonic acid (IV) and mangiferolic acid (V), besides a new ketoaldehyde (III).
TRITERPINOIDS FROM MANGIFERA INDICA
Anjaneyulu, V.,Prasad, K. Harischandra,Ravi, K.,Conolly, J. D.
, p. 2359 - 2368 (2007/10/02)
Key Word Index - Mangifera indica; Anacardiaceae; triterpinoids. - From the neutral fraction of the n-hexane extract of stem bark of Mangifera indica (var./cv Banganpalli) six new tetracyclic triterpenoids, cycloart-24-ene-3β,26-diol, the C-24 epimers of cycloart-25-ene-3β,24,27-triol, the C-24 epimers of cycloartane-3β,24,25-triol and 3-ketodammar-24E-ene-20S,26-diol together with known compounds cycloartenol, α-amyrin, β-amyrin, sitosterol, 3β-hydroxycycloart-25-en-26-al, dammarenediol II, the C-24 epimers of cycloart-25-ene-3β,24-diol, 24-methylenecycloartane-3β,26-diol, ψ-taraxastane-3β,20-diol and ocotillol II have been isolated.The acidic fraction of the same extract, on esterification with diazomethane followed by chromatography, yielded methyl mangiferonate, methyl isomangiferolate, methyl mangiferolate and diazomethane adduct of methyl mangiferolate.The structures were elucidated by spectroscopic and chemical methods.
