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Volumn 3, Issue 8-9, 2008, Pages 1443-1455

PdII-catalyzed asymmetric addition reactions of 1,3-dicarbonyl compounds: Mannich-type reactions with N-boc imines and three-component aminomethylation

Author keywords

1,3 dicarbonyl compounds; Aminomethylation; Mannich reactions; Palladium; Quaternary centers

Indexed keywords


EID: 54849421561     PISSN: 18614728     EISSN: 1861471X     Source Type: Journal    
DOI: 10.1002/asia.200800120     Document Type: Article
Times cited : (41)

References (95)
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    • A protic acid is known to be a classical catalyst for Mannich reactions. In our case, the reaction of 3e with 4a proceeded in the presence of 5 mol% TfOH to afford a racemic product in 50% yield (20 h, room temperature).
    • A protic acid is known to be a classical catalyst for Mannich reactions. In our case, the reaction of 3e with 4a proceeded in the presence of 5 mol% TfOH to afford a racemic product in 50% yield (20 h, room temperature).
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    • 2: 81%, 55% ee (1.5 h); toluene: 99%, 68% ee (1.5 h); DMF: 75%, 49% ee (24 h); EtOH: 64%, 10% ee (24 h).
    • 2: 81%, 55% ee (1.5 h); toluene: 99%, 68% ee (1.5 h); DMF: 75%, 49% ee (24 h); EtOH: 64%, 10% ee (24 h).
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    • Lowering the reaction temperature improved the enantiomeric excess by <10% at the cost of the reaction rate. Thus, the reaction catalyzed by 1a at -20°C gave the product 15e in 66% yield with 64% ee after 15 h
    • Lowering the reaction temperature improved the enantiomeric excess by <10% at the cost of the reaction rate. Thus, the reaction catalyzed by 1a at -20°C gave the product 15e in 66% yield with 64% ee after 15 h.
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    • The reaction using diphenylmethylamine salt gave similar results to those in the case of benzylamine salt. Tosyl amide and BocNH2 were not available in this reaction, and the hydroxymethylated product alone was obtained
    • 2 were not available in this reaction, and the hydroxymethylated product alone was obtained.


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