Silver-Catalyzed Radical Aminofluorination of Unactivated Alkenes in Aqueous Media
作者:Zhaodong Li、Liyan Song、Chaozhong Li
DOI:10.1021/ja400124t
日期:2013.3.27
We report herein a mild and catalytic intramolecularaminofluorination of unactivated alkenes. Thus, with the catalysis of AgNO3, the reactions of various N-arylpent-4-enamides with Selectfluor reagent in CH2Cl2/H2O led to the efficient synthesis of 5-fluoromethyl-substituted γ-lactams. A mechanism involving silver-catalyzed oxidative generation of amidyl radicals and silver-assisted fluorine atom
Synthesis of Substituted γ- and δ-Lactams via Pd-Catalyzed Alkene Carboamination Reactions
作者:Jordan R. Boothe、Yifan Shen、John P. Wolfe
DOI:10.1021/acs.joc.7b00041
日期:2017.3.3
substituted γ- and δ-lactams via palladium-catalyzedalkenecarboaminationreactions between aryl halides and alkenes bearing pendant amides is described. The substrates for these reactions are generated in 1–3 steps from commercially available materials, and products are obtained in good yield with up to >20:1 diastereoselectivity. The stereochemical outcome of the alkene addition is consistent with a
Merging Photoredox PCET with Ni-Catalyzed Cross-Coupling: Cascade Amidoarylation of Unactivated Olefins
作者:Shuai Zheng、Álvaro Gutiérrez-Bonet、Gary A. Molander
DOI:10.1016/j.chempr.2018.11.014
日期:2019.2
integration of amidylradicals with cross-coupling chemistry opens new avenues for reaction design. However, the lack of efficient methods for the generation of such radical species has prevented many such transformations from being brought to fruition. Herein, the amidoarylation of unactivated olefins by a cascade processfrom non-functionalized amides is reported by merging, for the first time, photoredox
Study on the total synthesis of velbanamine: Chemoselective dioxygenation of alkenes with PIFA via a stop-and-flow strategy
作者:Huili Liu、Kuan Zheng、Xiang Lu、Xiaoxia Wang、Ran Hong
DOI:10.3762/bjoc.9.113
日期:——
5-hydroxymethyl-gamma-lactones were constructed after hydrolysis. This strategy also differentiates terminally substituted alkenes and constitutes a potentially novel synthetic approach for the efficient synthesis toward velbanamine.
Enantioselective Synthesis of Cyclic Secondary Amines through Mo-Catalyzed Asymmetric Ring-Closing Metathesis (ARCM)
作者:Sarah J. Dolman、Richard R. Schrock、Amir H. Hoveyda
DOI:10.1021/ol036026n
日期:2003.12.1
Carbocyclic amines are synthesized efficiently in up to 93% ee by asymmetric ring-closing metathesis (ARCM) with 2-5 mol % chiral Mo complexes. An example is provided where the catalyst is prepared in situ (catalyst isolation not needed) to afford secondary amines that cannot be prepared by alternative methods. [reaction: see text]