Ligand-Controlled Nickel-Catalyzed Tandem Isomerization/Regiodivergent Hydroheteroarylation of α-Alkenes with Heteroarenes
作者:Sajid Imran、Wen-Hui Jin、Rui-Peng Li、Nadia Ismaeel、Hong-Mei Sun
DOI:10.1021/acs.orglett.2c03689
日期:2022.12.9
We herein describe an accessible ligand-controlled nickel-catalyzed tandem isomerization/regiodivergent hydroheteroarylation of α-alkenes with a series of heteroarenes, wherein the NHC ligand of heteroleptic Ni(II) complexes of the type Ni(NHC)[P(OEt)3]Br2 displayed significant effects on regulation. In the presence of NaOtBu, Ni(IMes)[P(OEt)3]Br2 enables C═C bond isomerization of α-alkenes over up
Monocarboxylation and Intramolecular Coupling of Butenylated Arenes via Palladium-Catalyzed C–H Activation Process
作者:Rui Liu、Ze-Hai Lu、Xiao-Hui Hu、Jun-Li Li、Xian-Jin Yang
DOI:10.1021/acs.orglett.5b00376
日期:2015.3.20
A novel and practical reaction for the direct intramolecular oxidative coupling of butenylated arenes is reported. With the catalysis of Pd(OAc)(2), reactions of various butenylated arenes and carboxylic acids with Selectfluor reagent in CH3CN solution afforded the corresponding monocarboxylation/cyclization products in good yields under mild conditions. This research demonstrated an economic method with the synthesis of 2-tetralyl carboxylic esters, a valuable class of bioactive compounds.
Multifunctional oxygen vacancies in WO3– for catalytic alkylation of C–H by alcohols under red-light
Enantioselective Intermolecular C–H Amination Directed by a Chiral Cation
作者:Alexander Fanourakis、Benjamin D. Williams、Kieran J. Paterson、Robert J. Phipps
DOI:10.1021/jacs.1c05206
日期:2021.7.14
The enantioselective amination of C(sp3)–H bonds is a powerful synthetic transformation yet highly challenging to achieve in an intermolecular sense. We have developed a family of anionic variants of the best-in-class catalyst for Rh-catalyzedC–Hamination, Rh2(esp)2, with which we have associated chiral cations derived from quaternized cinchona alkaloids. These ion-paired catalysts enable high levels