Vikram Bhat, Kevin M. Allan, V. Rawal
Mar 29, 2011
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Journal
Journal of the American Chemical Society
Abstract
Described is a concise total synthesis of N-methylwelwitindolinone D isonitrile, the first in a family of complex bicyclo[4.3.1]decane-containing indole alkaloids to yield to synthesis. The complete carbon core of the natural product was assembled rapidly through a Lewis acid-mediated alkylative coupling followed directly by a palladium-catalyzed enolate arylation reaction. The final ring of the pentacycle was introduced by an indole oxidation/cyclization, and the isonitrile was installed through the rearrangement of an aldehyde to an isothiocyanate followed by desulfurization.