Ynamides are tested as new partners in radical and organometallic transformations. A radical cascade involving a 5-exo-dig cyclization followed by a 6-endo-trig radical trapping transforms ynamides into hetero-polycyclic compounds such as isoindoles, isoindolinones and pyrido-isoindolones. Various ene–tosylynamides react with platinum(II) chloride and lead to bicyclic nitrogenated heterocycles. This
Facile one-pot synthesis of 2-aminoindoles from simple anilines and ynamides
作者:Young Ho Kim、Huen Ji Yoo、So Won Youn
DOI:10.1039/d0cc06490d
日期:——
A highly effective and straightforward one-potsynthesis of diversely substituted 2-aminoindoles has been developed, involving sequential Au(I)-catalyzed regioselective hydroamination and CuCl2-mediated oxidative cyclization. This protocol offers an operationally easy, simple, robust, and sustainable approach with the use of readily available starting materials, good functional group tolerance, and
Domino Heck-Aza-Michael Reactions: A One-Pot, Sequential Three-Component Approach to 1,1-Dioxido-1,2-benzisothiazoline-3-acetic Acid
作者:Alan Rolfe、Kyle Young、Paul R. Hanson
DOI:10.1002/ejoc.200800651
日期:2008.11
development of a new method for the synthesis of 1,1-dioxido-1,2-benzisothiazoline-3-acetic acid by a domino process is reported whereby a classical Heck reaction is coupled to an intramolecular aza-Michael reaction. Ultimately, this method has been expanded to a one-pot, sequential three-component protocol to generate diverse benzofused γ-sultams from a range of commercially available α-bromobenzenesulfonyl
Synthesis of Axially Chiral
<i>N</i>
‐Arylindoles via Atroposelective Cyclization of Ynamides Catalyzed by Chiral Brønsted Acids
作者:Ze‐Shu Wang、Lu‐Jing Zhu、Cui‐Ting Li、Bin‐Yang Liu、Xin Hong、Long‐Wu Ye
DOI:10.1002/anie.202201436
日期:2022.5.9
A chiral Brønsted acid-catalyzed atroposelectivecyclization of ynamides is disclosed, which represents the first metal-free protocol for the construction of axiallychiral compounds from ynamides. This method enables the practical and atom-economical synthesis of valuable N-arylindoles in excellent yields with generally excellent enantioselectivities.
Copper-Catalyzed Enantioselective Aerobic Alkene Aminooxygenation and Dioxygenation: Access to 2-Formyl Saturated Heterocycles and Unnatural Proline Derivatives
作者:Raul L. L. Carmo、Samuel L. Galster、Tomasz Wdowik、Chaeeon Song、Sherry R. Chemler
DOI:10.1021/jacs.3c01985
日期:2023.6.28
Alkeneaminooxygenation and dioxygenation reactions that result in carbonyl products are uncommon, and protocols that control absolute stereochemistry are rare. We report herein catalytic enantioselective alkeneaminooxygenation and dioxygenation that directly provide enantioenriched 2-formyl saturated heterocycles under aerobic conditions. Cyclization of substituted 4-pentenylsulfonamides, catalyzed