No abstract

Preparation of Fused Tricycles Using Allylsilane-Based "A + C → ABC" Annulation Strategies.-Studies directed toward the preparations of the basic carbocyclic skeleton of three synthetically challenging, biologically important natural products (ikarugomycin, phorbol, and taxol) featuring allylsilane-based annulation strategies are presented. - (MAJETICH, G.; ZHANG, Y.; NISHIDE, H.; HULL, K.; Bull. Soc. Chim. Fr. 132 (1995) 5-6, 575-584; Dep. Chem., Univ. Ga., Athens, GA 30602, USA; EN)

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Use of Conjugated Dienones in Cyclialkylations: The Total Syntheses of (±)-Barbatusol, (±)-Pisiferin, (±)-Deoxofaveline, (±)-Xochitlolone, and (±)-Faveline.-The racemic tricyclic triterpenoids barbatusol (V), pisiferin (VI), deoxyfaveline (VIIa), faveline (VIIb), and xochitlolone (VIII) are synthesized in 15, 11, 13, 2, and 7% overall yields, resp., via cyclialkylation of a functionalized arene containing a Lewis acid activated conjugated dienone, e.g. (II), as key step. -(MAJETICH, G.; HICKS, R.; ZHANG, Y.; TIAN, X.; FELTMAN, T. L.; FANG, J.; DUNCAN, S. JUN.; J.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.