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