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Synlett 2011(15): 2200-2202
DOI: 10.1055/s-0030-1261179
DOI: 10.1055/s-0030-1261179
LETTER
© Georg Thieme Verlag
Stuttgart ˙ New YorkSolvent-Free Synthesis of Enamines from Alkyl Esters of Propiolic or But-2-yne Dicarboxylic Acid in a Ball Mill
Weitere Informationen
Received
8 June 2011
Publikationsdatum:
12. August 2011 (online)
Publikationsverlauf
Publikationsdatum:
12. August 2011 (online)

Abstract
A solvent-free method for the addition of amines to dialkylacetylendicarboxylates or alkylpropiolates using a planetary ball mill was developed. Conversion of educts was quantitative within five minutes without use of any catalyst or base. Beside the E-/Z-isomers, no side products were formed.
Key words
addition - amines - alkynes - enamines - green chemistry
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