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Zur Frage der katalytischen Wirksamkeit organischer Lewissäuren. Die Verätherung von Methanol durch Diazoessigester in Gegenwart organischer Lewissäuren Zur Kenntnis organischer Lewissäuren, 29. Mitt.

Research paper by R. Neunteufel, J. Leitich, O. E. Polansky

Indexed on: 01 May '73Published on: 01 May '73Published in: Monatshefte für Chemie - Chemical Monthly



Abstract

Organic Lewis acids are completely without activity as acid catalysts. Their reaction with ethyl diazoacetate in methanol follows a complex path; the etherification of methanol with formation of ethyl methoxyacetate which occurs is due to general and specific Brønsted acid catalysis by secondary products. Structural characteristics which enhance the Lewis or Brønsted acid character of methylene Meldrum's acids play a decisive role.