Ponomaryov D.V.; Grigor´eva L.R.; Nemtarev A.V.; Tsepaeva O.V.; Mironov V.F.; Antipin I.S.
(2020)
© 2020, Springer Science+Business Media LLC. 3β,28-Diacetoxylup-20(29)-en-30-oic acid (obtained via oxidation of betulin diacetate) enters the addition reaction with P—H-phosphonium salts (triarylphosphonium trifluoroacetates) ...