Novel Syntheses of Fluorenones via Nitrile-Directed Palladium-Catalyzed C–H and Dual C–H Bond Activation
摘要:
Novel procedures for the [Pd]/[Ag]/TFA system catalyzed cascade reactions of nitrile directed remote C-H and dual C-H bond activation with insertion of nitrile were developed, which afforded variously polysubstituted fluorenones in moderate to good yields with tolerance of a wide variety of substrates.
Microwave-assisted Negishi and Kumada cross-coupling reactions of aryl chloridesElectronic supplementary information (ESI) available: Experimental procedures and spectral data. See http://www.rsc.org/suppdata/cc/b3/b313887a/
作者:Peter Walla、C. Oliver Kappe
DOI:10.1039/b313887a
日期:——
Rapid Pd or Ni-catalyzed microwave-accelerated Negishi and Kumada cross-coupling reactions of aryl chlorides in solution and on solid phase are reported.
A pH-responsive Pd(II) N-heterocyclic tetracarbene complex synthesized by a solvothermal method was reported. It can be a highly activereusablecatalyst to homogeneously catalyze the Suzuki–Miyaura cross-coupling reaction in water and can be heterogeneously recovered by simply adjusting the pH value of the aqueous reaction media.
Radical Anions of Aromatic Carbonitriles as Reagents for Arylation of Fluorinated Benzonitriles
作者:Roman Yu. Peshkov、Chunyan Wang、Elena V. Panteleeva、Tatyana V. Rybalova、Evgeny V. Tretyakov
DOI:10.1021/acs.joc.8b02904
日期:2019.1.18
and (1-naphthyl)benzonitriles, respectively. The radical anion acts as an ipso-C-nucleophile with consequent loss of the cyano group. The revealed new type of radical anion reactivity opens up the prospect of developing a general approach to fluorinated cyanobisarenes on the basis of an interaction of the cyanoarene radical anion with fluorinated substrates activated to aromatic nucleophilic substitution
Direct Synthesis of Biphenyl-2-carbonitriles by Rh(III)-Catalyzed C–H Hiyama Cross-Coupling in Water
作者:Xiuqi Zhang、Fukuan Zhang、Xiaolan Li、Ming-Zhu Lu、Xin Meng、Lei Huang、Haiqing Luo
DOI:10.1021/acs.orglett.2c01754
日期:2022.7.22
This method represents an efficient rhodium(III)-catalyzed o-C–H arylation of readily available benzimidate derivatives with diverse arylsilanes in water as a sustainable solvent, enabling the straightforward synthesis of potentially useful biphenyl-2-carbonitrile derivatives. This silicon-based protocol employs benzimidates as both an efficacious directing group and the source of a nitrile group.