Rapid Access to Spirocyclized Indolenines via Palladium-Catalyzed Cascade Reactions of Tryptamine Derivatives and Propargyl Carbonate
作者:Thomas D. Montgomery、Antoinette E. Nibbs、Ye Zhu、Viresh H. Rawal
DOI:10.1021/ol501409a
日期:2014.7.3
We report the intermolecular palladium-catalyzedreaction of tert-butyl propargylcarbonate with tryptamine derivatives or other indole-containing bis-nucleophiles. The reaction proceeds under mild conditions and with low catalyst loadings to afford novel spiroindolenine products in good to high yields.
A facile construction of the spiro[indole-3,2′-pyrrolidine] skeleton, through diacetoxyiodobenzene (PIDA) mediated C–N bond-forming dearomatization of C3 sulfonamide linked indole derivatives, has been developed.