N‐Heterocyclic Carbene (NHC)‐Catalyzed/Lewis Acid Mediated Conjugate Umpolung of Alkynyl Aldehydes for the Synthesis of Butenolides: A Formal [3+2] Annulation

Publisher： John Wiley & Sons Inc

E-ISSN： 1521-3765|19|13|4146-4150

ISSN： 0947-6539

Source： CHEMISTRY - A EUROPEAN JOURNAL, Vol.19, Iss.13, 2013-03, pp. : 4146-4150

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