Synthesis of functionalized 2,4-imidazolidinone and 2-thioxoimidazolidin-4-one from an enantiomerically pure aziridine-2-carbaldehyde

ORGN 792

Baeck Kyoung Lee, baggaeng@hotmail.com1, Sae Young Yun1, Dong Sub Kim1, Won Koo Lee1, and Hyun-Joon Ha2. (1) Department of Chemistry and Interdisciplinary Program of Integrated Biotechnology, Sogang University in South Korea, Ricci Building unit1318 Sogang University Sin Su Dong #1 Mapo Gu, Seoul, South Korea, (2) Department of Chemistry, Hankuk University of Foreign Studies, Yongin 449-791, Kyung Gi Do, South Korea
Enantiomerically pure 1,3,5-functionalized 2,4-imidazolidinone and 2-thioxoimidazolidin-4-one were synthesized efficiently from the commercially available chiral aziridine carbaldehyde. The reaction includes the reductive coupling of the chiral aziridine-2-carboxaldehyde with a-amino ester, the addition of isocyanates or thioisocyanates and the subsequent intramolecular cyclization to provide the target compounds in high yields.