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
Photoinduced C-C Bond Cleavage and Oxidation of Cycloketoxime Esters
作者:Binlin Zhao、Hui Tan、Cheng Chen、Ning Jiao、Zhuangzhi Shi
DOI:10.1002/cjoc.201800206
日期:2018.11
the traditional Beckmann rearrangement process has been established to build cyano‐containing ketones in the presence of photocatalyst. This novel transformation is remarkable with selective C—Cbondcleavage and an oxidation process enabled by DMSO used as the solvent, oxidant, and oxygen source avoiding acid, base and toxic cyanide salts as the cyano source. Further applications in late‐stage modification
General and Efficient Insertions of Carbons Carrying Aryl and Heteroaryl Groups: Synthesis of α-Aryl- and α-Heteroaryl-Substituted Ketones
作者:Alan R. Katritzky、Dorin Toader、Linghong Xie
DOI:10.1021/jo960841h
日期:1996.1.1
iazoles 1 with n-BuLi underwent addition to aliphatic and aromatic aldehydes and cyclic and acyclic ketones. Subsequent in situ thermal rearrangements of the intermediates in the presence of zinc bromide provided one-carbon chain-extended or ring-expanded alpha-aryl- and alpha-heteroaryl-substituted ketones 2 in moderate to excellent yields in simple one-pot operations with excellent regioselectivity
Synthesis of α-Arylated Cycloalkanones from Congested Trisubstituted Spiro-epoxides: Application of the House–Meinwald Rearrangement for Ring Expansion
作者:Nagalakshmi Jeedimalla、Camille Jacquet、Diana Bahneva、Jean-Jacques Youte Tendoung、Stéphane P. Roche
DOI:10.1021/acs.joc.8b01448
日期:2018.10.19
achieving ring enlargement for electron-deficient spiro-epoxides. On the other hand, by means of catalysis with aluminum trichloride, the rearrangement of spiro-epoxides proceeded typically in high yields and with remarkable regioselectivity on a broader substrate scope. In this case, a switch of regioselectivity was achieved for spiro-epoxides with electron-withdrawing substituents which enable the
Preparation of Alkyl Di(<i>p</i>-tolyl)sulfonium Salts and Their Application in Metal-Free C(sp<sup>3</sup>)–C(sp<sup>3</sup>) and C(sp<sup>3</sup>)–C(sp<sup>2</sup>) Bond Formations
Alkyldiarylsulfonium salts were synthesized by a combination of active sulfonium species, prepared through the activation of diarylsulfoxide, and alkyl nucleophiles. The isolated sulfonium salts were subjected to the allylation and cyclopropanation of the active methylene compounds and metal-free C(sp3)–C(sp2) couplings via oxyallyl cation intermediates under mild conditions. The series of reactions