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|Type:||Artigo de periódico|
|Title:||Formal gas-phase polar [4+1(+)] cycloaddition of ionized methylene to alpha-dicarbonyl compounds: synthesis of 2-unsubstituted 1,3-dioxoles|
|Abstract:||Ion/molecule reactions of +CH2OCH2 with alpha-dicarbonyl compounds were performed via pentaquadrupole mass spectrometry. Besides the previously known [3(+) + 2] 1,3-cycloaddition reaction that forms cyclic 1,3-dioxonium ions, an unprecedented reaction proceeding formally by [4 + 1(+)] cycloaddition of ionized methylene (CH2+) to the alpha-dicarbonyl compounds occurs competitively, leading to the gas-phase synthesis of several ionized 2-unsubstituted 1,3-dioxoles. This novel cycloaddition reaction may therefore be added to the set of methods available for the synthesis of 1,3-dioxoles. Copyright (c) 2006 John Wiley & Sons, Ltd.|
pentaquadrupole mass spectrometry
|Editor:||John Wiley & Sons Ltd|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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