<i>N</i>-Alkylation of α-Iminophosphonates and Application to Horner–Wadsworth–Emmons Reaction
作者:Makoto Shimizu、Masasato Tateishi、Isao Mizota
DOI:10.1246/cl.140763
日期:2014.11.5
N-Alkylation of α-iminophosphonates with Grignard reagents gives α-N-alkylaminophosphonates. A subsequent Horner–Wadsworth–Emmons reaction of the intermediary α-metalated phosphonate takes place with aldehydes to give enamines. The enamine thus prepared reacts with MVK to give a four-component coupling product.
α-Imino Iridium Carbenes from Imidoyl Sulfoxonium Ylides: Application in the One-Step Synthesis of Indoles
作者:Clarice A. D. Caiuby、Matheus P. de Jesus、Antonio C. B. Burtoloso
DOI:10.1021/acs.joc.0c00833
日期:2020.6.5
Imidoyl sulfoxonium ylides are presented for the first time as potential precursors to generate α-imino metal-carbene intermediates and applied in direct C–H functionalization reactions catalyzed by [Ir(cod)Cl]2 (4 mol %) to provide 2-substituted indoles (up to 70% yield) in just one step. This class of sulfur ylide is successfully obtained from imidoyl chloride and dimethylsulfoxonium methylide (23
Proton-Transfer Polymerization by <i>N</i>-Heterocyclic Carbenes: Monomer and Catalyst Scopes and Mechanism for Converting Dimethacrylates into Unsaturated Polyesters
presents a full account of experimental and theoretical/computational investigations into the N-heterocyclic carbene (NHC)-catalyzed proton-transfer polymerization (HTP) that converts common dimethacrylates (DMAs) containing no protic groups into unsaturated polyesters. This new HTP proceeds through the step-growth propagation cycles via enamine intermediates, consisting of the proposed conjugate addition-proton
Isonitrile alkylations: a rapid route to imidazo[1,5-a]pyridines
作者:Yajun Li、Allen Chao、Fraser F. Fleming
DOI:10.1039/c5cc08724d
日期:——
Metalated isonitriles react with 2-chloropyridine-type electrophiles in an addition–cyclization route to valuable heterocycles.
金属化异腈与2-氯吡啶类亲电试剂发生加成-环化反应,形成有价值的杂环化合物。
Palladium-Catalyzed Cyclocarbonylation of <i>o</i>-Iodoanilines with Imidoyl Chlorides to Produce Quinazolin-4(<i>3H</i>)-ones
作者:Zhaoyan Zheng、Howard Alper
DOI:10.1021/ol7029454
日期:2008.3.1
variety of substituted quinazolin-4(3H)-ones were prepared in 63-91% yields by the palladium-catalyzed cyclocarbonylation of o-iodoanilines with imidoyl chlorides and carbon monoxide. The reaction is believed to proceed via in situ formation of an amidine, followed by oxidative addition, CO insertion, and intramolecular cyclization to give the substituted quinazolin-4(3H)-ones.