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Acid–Base Pairs in Lewis Acidic Zeolites Promote Direct Aldol Reactions by Soft Enolization (in German)

Journal Article · · Angewandte Chemie

Abstract

Hf‐, Sn‐, and Zr‐Beta zeolites catalyze the cross‐aldol condensation of aromatic aldehydes with acetone under mild reaction conditions with near quantitative yields. NMR studies with isotopically labeled molecules confirm that acid‐base pairs in the Si‐O‐M framework ensemble promote soft enolization through α‐proton abstraction. The Lewis acidic zeolites maintain activity in the presence of water and, unlike traditional base catalysts, in acidic solutions.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0008742
OSTI ID:
1786085
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 34 Vol. 127; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
German

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