Synlett 2011(5): 619-622  
DOI: 10.1055/s-0030-1259696
LETTER
© Georg Thieme Verlag Stuttgart ˙ New York

Reaction between N-Isocyaniminotriphenylphosphorane, Aldimines, Meldrum’s Acid and Water: Diastereoselective Synthesis of 3,4-Disubstituted N-Aminopyrrolidine-2,5-diones

Mehdi Adib*a, Samira Ansaria, Hamid Reza Bijanzadehb
a School of Chemistry, University College of Science, University of Tehran, PO Box 14155-6455, Tehran, Iran
Fax: +98(21)66495291; e-Mail: madib@khayam.ut.ac.ir;
b Department of Chemistry, Tarbiat Modarres University, PO Box 14115-175, Tehran, Iran
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Received 23 September 2010
Publikationsdatum:
25. Februar 2011 (online)

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Abstract

A multicomponent synthesis of 3,4-disubstituted N-aminopyrrolidine-2,5-diones is described. A mixture of N-isocyan­iminotriphenylphosphorane, an aldimine and Meldrum’s acid undergoes an addition reaction under mild conditions in aqueous THF to produce 1-amino-4-aryl-2,5-dioxo-N ³-aryl-3-pyrrolidinecarboxamides diastereoselectively in good to excellent yields. ¹H NMR analysis showed that the two substituents on C-3 and C-4 ­positions of the obtained pyrrolidine-2,5-diones are trans.