Efficient Synthesis of Functionalized 2,5-Dihydropyrrole Derivatives by Ph3P-Promoted Condensation between Acetylene Esters and α-Arylamino Ketones
Mohammad Anary-Abbasinejad*, Ehsanorreza Poorhassan, Alireza Hassanabadi
*Department of Chemistry, Islamic Azad University, Yazd Branch, PO Box 89195-155, Yazd, Iran, Email: mohammadanaryyahoo.com
M. Anary-Abbasinejad, E. Poorhassan, A. Hassanabadi, Synlett, 2009, 1929-1932.
A reaction between dialkyl acetylenedicarboxylates and β-aminoketones promoted by triphenylphosphine allows an efficient one-pot synthesis of polysubstituted 2,5-dihydropyrrole derivatives. The prepared 2,5-dihydropyrroles can be easily oxidized to the corresponding pyrrole derivatives with chromium trioxide.
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M. Anary-Abbasinejad, K. Charkhati, H. Anaraki-Ardakani, Synlett, 2009, 1115-1117.