Convenient Room‐Temperature, Mercury‐Assisted Synthesis of Tetrazoles by 1,3‐Dipolar Cycloaddition
作者:Thomas M. Klapötke、Burkhard Krumm、Richard Moll
DOI:10.1002/ejic.201001046
日期:2011.1
AbstractThe intermolecular 1,3‐dipolar cycloaddition of organomercury(II) azides R1HgN3 (R1 = Me, Ph) to organonitriles R2CN (R2 = Me, Ph, C6F5) forms organomercury(II) tetrazoles R1Hg(N4C)R2 [R1 = Me, R2 = Me (1); R1 = Me, R2 = Ph (2); R1 = Ph, R2 = Me (3); R1 = Ph, R2 = Ph (4); R1 = Ph, R2 = C6F5 (5)]. The reaction is a direct and regioselective formation of the tetrazole moiety, which is easily performed at room temperature or slightly elevated temperature without a catalyst and furnishes quantitatively the pure product. In addition to characterization by multinuclear NMR spectroscopy, IR and Raman spectroscopy, as well as mass spectrometry, the mercury content was determined. Furthermore, X‐ray diffraction studies were performed, and the crystal structures for 1–3 and 5 are reported.