Addition of primary amines to 1-phenyl-5-trimethylsilylpenta-1,4-diyn-3-one with subsequent cyclization affords 5-phenyl-2-(trimethylsilylmethylidene)-1,2-dihydro-3H-pyrrol-3-ones. Both electron-rich and electron-deficient anilines and alkyl amines provide regio- and stereoselective formation of single product in high yields. The two-step transformation benefits from full atom economy, operational simplicity, and no need for additives and catalysts.
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This work was supported by the Russian Science Foundation (grant 18-73-00089).
NMR, HRMS, and XRD analyses were performed at Saint Petersburg State University Center for Magnetic Resonance, Center for Chemical Analysis and Materials Research, and X-ray Diffraction Center, respectively.
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Published in Khimiya Geterotsiklicheskikh Soedinenii, 2019, 55(7), 672–675
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Pankova, A.S., Cherepanova, N.D., Golubev, P. et al. Selective Synthesis of 2-Methylidenepyrrol-3-Ones from Diynones and Amines. Chem Heterocycl Comp 55, 672–675 (2019). https://doi.org/10.1007/s10593-019-02515-4
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DOI: https://doi.org/10.1007/s10593-019-02515-4