Oxidation of Nonactivated Anilines to Generate <i>N</i>-Aryl Nitrenoids
作者:Tianning Deng、Wrickban Mazumdar、Russell L. Ford、Navendu Jana、Ragda Izar、Donald J. Wink、Tom G. Driver
DOI:10.1021/jacs.9b13599
日期:2020.3.4
and selective C-NAr and C-C bond formation to yield spirocyclic- or bicyclic 3H-indoles or benzazepinones. Our experiments demonstrate the breadth of these oxidative processes, uncover underlying fundamental elements that control selectivity and demonstrate how the distinct reactivi-ty patterns embedded in N-aryl nitrenoid reactive intermediates can enable access to functionalized 3H-indoles or benzazepinones
I(III)-Catalyzed Oxidative Cyclization–Migration Tandem Reactions of Unactivated Anilines
作者:Tianning Deng、Emily Shi、Elana Thomas、Tom G. Driver
DOI:10.1021/acs.orglett.0c03497
日期:2020.11.20
An I(III)-catalyzed oxidative cyclization–migration tandem reaction using Selectfluor as the oxidant was developed that converts unactivated anilines into 3H-indoles is reported herein. The reaction requires as little as 1 mol % of the iodocatalyst and is mild, tolerating pyridine and thiophene functional groups, and the dependence of the diastereoselectivity of the process on the identity of the iodoarene
Total Synthesis of (−)-Calycanthine via Iron-Catalyzed Stereoselective Oxidative Dimerization
作者:Leiyang Bai、Yinhao Ma、Xuefeng Jiang
DOI:10.1021/jacs.1c10498
日期:2021.12.15
Dimeric cyclotryptaminealkaloids typically feature vicinalall-carbonquaternarystereocenters and four nitrogen atoms. In comparison with the actual biosynthetic tryptophan derivatives, we designed the 2N-featured monomer 7, aiming to construct vicinalall-carbonquaternarystereocenters via a one-step dimerization process to access the 4N-featured isomeric members of this family. In this work, we
Development of a Suzuki Cross-Coupling Reaction between 2-Azidoarylboronic Pinacolate Esters and Vinyl Triflates To Enable the Synthesis of [2,3]-Fused Indole Heterocycles
作者:Navendu Jana、Quyen Nguyen、Tom G. Driver
DOI:10.1021/jo500252e
日期:2014.3.21
The scope and limitations of a Suzukireaction between 2-azidoarylboronic acid pinacolate esters and vinyl triflates are reported. This cross-couplingreaction enables the regioselective synthesis of indoles after a subsequent RhII2-catalyzed sp2-C–H bond amination reaction.
The first example of catalytic enantioselective tautomerization of structurally labile but isolable enamines for accessing their chiral imine-tautomers is described. Kinetically stable enamine-based dibenzo[b,d]azepines were tautomerized by a simple chiral BINOL–phosphoric acid, providing a variety of seven-membered imine products bearing both central and axial stereogenic elements in good yields (up