4.4 Article

Solvent-Free Synthesis of Enamines from Alkyl Esters of Propiolic or But-2-yne Dicarboxylic Acid in a Ball Mill

Journal

SYNLETT
Volume -, Issue 15, Pages 2200-2202

Publisher

GEORG THIEME VERLAG KG
DOI: 10.1055/s-0030-1261179

Keywords

addition; amines; alkynes; enamines; green chemistry

Funding

  1. German Federal Environmental Foundation (DBU) [27281-31]

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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.

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