810682-53-2Relevant academic research and scientific papers
Formal total synthesis of (-)-taxol through Pd-catalyzed eight-membered carbocyclic ring formation
Hirai, Sho,Utsugi, Masayuki,Iwamoto, Mitsuhiro,Nakada, Masahisa
, p. 355 - 359 (2015/02/19)
A formal total synthesis of (-)-taxol by a convergent approach utilizing Pd-catalyzed intramolecular alkenylation is described. Formation of the eight-membered carbocyclic ring has been a problem in the convergent total synthesis of taxol but it was solved by the Pd-catalyzed intramolecular alkenylation of a methyl ketone affording the cyclized product in excellent yield (97 %), indicating the high efficiency of the Pd-catalyzed intramolecular alkenylation. Rearrangement of the epoxy benzyl ether through a 1,5-hydride shift, generating the C3 stereogenic center and subsequently forming the C1-C2 benzylidene, was discovered and utilized in the preparation of a substrate for the Pd-catalyzed reaction.
Development of silicon-tethered anionic reaction and its application to the synthesis of chiral A-ring moieties of Taxol
Iwamoto, Mitsuhiro,Miyano, Masayuki,Utsugi, Masayuki,Kawada, Hatsuo,Nakada, Masahisa
, p. 8647 - 8651 (2007/10/03)
Silicon-tethered intramolecular nucleophilic additions of a hydroxymethyl unit to ketones in β-hydroxyketones have been developed. The product obtained by this protocol was successfully converted to chiral A-ring moieties of Taxol. Also developed was a pr
