The Mukaiyama Aldol Reactions for Congested Ketones Catalyzed by Solid Acid of Tin(IV) Ion-exchanged Montmorillonite

The Mukaiyama Aldol Reactions for Congested Ketones Catalyzed by Solid Acid of Tin(IV) Ion-exchanged Montmorillonite

Tin(IV) ion-exchanged montmorillonite (Sn-Mont) was found to be an excellent solid acid catalyst for the Mukaiyama aldol reactions of congested ketones with silicon enolates from ketones as well as esters. It was disclosed that Sn-Mont was far more active than other metal ion- or proton-exchanged mo...

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Veröffentlicht in:Chemistry letters 2014-04, Vol.43 (4), p.498-500
Hauptverfasser: Takehira, Satoshi, Masui, Yoichi, Onaka, Makoto
Format: Artikel
Sprache:eng
Schlagworte:
Aldehydes
Catalysts
Esters
Ketones
Montmorillonite
Silicon
Tin
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Zusammenfassung:Tin(IV) ion-exchanged montmorillonite (Sn-Mont) was found to be an excellent solid acid catalyst for the Mukaiyama aldol reactions of congested ketones with silicon enolates from ketones as well as esters. It was disclosed that Sn-Mont was far more active than other metal ion- or proton-exchanged montmorillonites and typical homogeneous acid catalysts such as TMSOTf and BF3·OEt2.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.131095