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Synthesis 2009(15): 2627-2633
DOI: 10.1055/s-0029-1217405
DOI: 10.1055/s-0029-1217405
PAPER
© Georg Thieme Verlag
Stuttgart ˙ New York
Hydrogenation of β-N-Substituted and β-N,N-Disubstituted Enamino Esters in the Presence of Iridium(I) Catalyst
Weitere Informationen
Received
3 April 2009
Publikationsdatum:
22. Juni 2009 (online)
Publikationsverlauf
Publikationsdatum:
22. Juni 2009 (online)
Abstract
Several new β-amino esters were prepared in two simple steps from β-keto ester derivatives and primary and secondary amines under mild conditions. The hydrogenation of various enamino esters was performed at 50 ˚C in the presence of iridium catalysts. The new β-N-substituted amino esters were isolated in high yields.
Key words
catalysis - hydrogenation - iridium - β-amino esters
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References
It was reported that trifluoroethanol was the best solvent for the hydrogenation of enamino esters and β-N-arylenamino esters in the presence of rhodium catalysts; see references 15 and 16.