A novel and highly diastereoselective intramolecular carbamoylketene/alkene [2 + 2] cycloaddition has been developed, and the methodology was successfully applied to the enantioselective syntheses of (−)-esermethole and Takayama’s intermediate for (+)-psychotrimine.
Diastereoselective Oxidative CN/CO and CN/CN Bond Formation Tandems Initiated by Visible Light: Synthesis of Fused<i>N</i>-Arylindolines
作者:Scott A. Morris、Theresa H. Nguyen、Nan Zheng
DOI:10.1002/adsc.201500317
日期:2015.7.6
The synthesis of fused N‐arylindolines using visiblelight photoredox catalysis has been developed. We previously described that photogenerated amine radical cations generate substituted indoles through an intermediate benzylic carbocation. Herein, we expand the application of this chemistry by trapping the benzylic carbocation with tethered heteronucleophiles. The reactivity of the photogenerated
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
Rh<sub>2</sub>(II)-Catalyzed Intramolecular Aliphatic C–H Bond Amination Reactions Using Aryl Azides as the N-Atom Source
作者:Quyen Nguyen、Ke Sun、Tom G. Driver
DOI:10.1021/ja301519q
日期:2012.5.2
Rhodium(II) dicarboxylate complexes were discovered to catalyze the intramolecularamination of unactivated primary, secondary, or tertiary aliphatic C-H bonds using arylazides as the N-atom precursor. While a strong electron-withdrawing group on the nitrogen atom is typically required to achieve this reaction, we found that both electron-rich and electron-poor arylazides are efficient sources for
发现二羧酸铑 (II) 配合物使用芳基叠氮化物作为 N 原子前体催化未活化的伯、仲或叔脂肪族 CH 键的分子内胺化。虽然通常需要氮原子上的强吸电子基团来实现该反应,但我们发现富电子和缺电子芳基叠氮化物都是金属氮烯反应中间体的有效来源。