Abstract
A method of phosphorylation of pentacyclic triterpenoids derivatives containing an α,β-unsaturated carbonyl fragment in the ring A was described by the example of the reaction of methyl (2-methylidene)-3-oxolup-20(29)-en-28-oate with dimethyl trimethylsilyl phosphite. Methyl 2-dimethoxyphosphorylmethyl-3-oxolup-20(29)-en-28-oate was obtained as two epimers in a 2: 1 ratio in a 70% yield.
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Dedicated to the 110th anniversary of M.I. Kabachnik’s birth
Original Russian Text © O.V. Tsepaeva, A.V. Nemtarev, T.I. Abdullin, E.V. Kuznetsova, V.F. Mironov, 2018, published in Zhurnal Obshchei Khimii, 2018, Vol. 88, No. 9, pp. 1576–1579.
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Tsepaeva, O.V., Nemtarev, A.V., Abdullin, T.I. et al. Reaction of Methyl (2-Methylidene)-3-oxolup-20(29)-en-28-oate with Dimethyl Trimethylsilyl Phosphite. Russ J Gen Chem 88, 1944–1947 (2018). https://doi.org/10.1134/S1070363218090335
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DOI: https://doi.org/10.1134/S1070363218090335