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Esterification of betulin with ω-bromoalkanoic acids

Esterification of betulin with ω-bromoalkanoic acids

A convenient synthesis of 8,8’-spirobi(chromano-1,2-oxaphosphinine) derivatives phosphorylated derivatives of spirodichromane and arylacetylenes with a high chemoselectivity.

Reaction of methyl 2-methylidene-3-oxolup-20(29)-en-28-oate with triphenylphosphonium trifluoromethanesulfonate with triphenylphosphonium trifluoromethanesulfonate in methylene chloride at 20°C afforded 90% of a γ

Synthesis of novel mannopyranosyl betulinic acid phosphoniohexyl esterA general approach to lupane monodesmosides containing a C-28 phosphonioalkyl group is based

Reaction of methyl 2-methylidene-3-oxolup-20(29)-en-28-oate with triphenylphosphonium trifluoromethanesulfonate with triphenylphosphonium trifluoromethanesulfonate in methylene chloride at 20°C afforded 90% of a γ

Synthesis of (PIII, PIII)-, (PIII, PV)-, (PIII, PIV)-, (PIV, PV)-, and (PV, PV)-Diphosphorus-Containing Compounds Based on 1,2,3- and 1,2,4-Trihydroxybenzenes

2,2,2-Trichloro-4-methoxy-1,3,2-benzodioxaphosphole in the reactions with terminal acetylenes

Synthesis of C-29-phosphonium derivatives of 3,28-diacetoxylup-20(29)-en-30-oic acid

Synthesis of C(28)-linker derivatives of betulinic acid bearing phosphonate groupA convenient method for the synthesis of C(28)-linker derivatives of triterpenoids containing a

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