Abstract
The use of ethylenediamine in methanol is described for the selective cleavage of the acetate group in nimbin (1) to 6-deacetyl nimbin (1a) under microwave irradiation. This method enables to deacetylate without affecting other functional groups such as α,β-unsaturated ketone, ester, ether, etc. in certain tetranortriterpenoids and other acetate-containing natural compounds.
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Acknowledgements
R.M.K. thanks DBT, V.P.S. and V.R.K. thank CSIR for the financial support and Spic Science Foundation for the Analytical Center Facility.
Supporting Information
Supporting information is available online.