C3-Allylation of Indoles via an Iridium-Catalyzed Branch-Selective Ring-Opening Reaction of Vinylcyclopropanes
作者:Guang-Jian Mei、Feng Shi、Lei Yu、Zi-Qi Zhu、Meng Sun
DOI:10.1055/s-0037-1611355
日期:2019.4
chemistry of vinylcyclopropanes. An iridium-catalyzed branch-selective ring-openingreaction of vinylcyclopropanes with indoles has been established, which afforded C3-allylindoles in generally good to excellent yields (up to 95%). Considering that no wastes were generated in the whole process and branch-selective ring-openingreaction of vinylcyclopropanes was rarely reported, this strategy not only can
herein a palladium(0)-catalyzed (3+2)-cycloaddition process between vinylcyclopropanes and cyclic or acyclic sulfonylimines. This reaction, which operates under low catalyst loading and practical reaction conditions, gives access to a wide variety of N-heterocyclic derivatives in good to excellent yields and high levels of diastereoselectivity.
Asymmetric preparation of polysubstituted cyclopentanes by synergistic Pd(0)/amine catalyzed formal [3+2] cycloadditions of vinyl cyclopropanes with enals
作者:Maxime Laugeois、Sudipta Ponra、Virginie Ratovelomanana-Vidal、Véronique Michelet、Maxime R. Vitale
DOI:10.1039/c6cc01775d
日期:——
We report herein a novel diastereo- and enantiocontrolled preparation of poylsubstituted cyclopentanes by the formal [3+2] cycloadditions of vinyl cyclopropanes with enals. In constrast with previously developed strategies, our original...
Regiodivergent Synthesis of Spirocyclic Compounds through Pd‐Catalyzed Regio‐ and Enantioselective [3+2] Spiroannulation
作者:Barry M. Trost、Zhijun Zuo
DOI:10.1002/anie.202016439
日期:2021.3.8
A novel Pd0‐catalyzed highly regio‐ and enantioselective [3+2] spiroannulation reaction has been developed for rapid assembly of a new class of [5,5] spirocyclic carbo‐ and heterocycles. Notably, the regioselectivity could be dominated by fine‐tuning of the Pd‐π‐allyl intermediate. An array of coupling partners could be well‐tolerated with excellent regio‐, and enantioselectivities. Moreover, the potential