M. Islam, Tomikazu Kawano, M. Hatanaka
Aug 5, 1996
Citations
0
Influential Citations
9
Citations
Journal
Tetrahedron Letters
Abstract
3-Ethoxycarbonyl-2-propenylidene(triphenyl)phosphorane (2) reacted with glyoxal monohydrates (5) to give 2-substituted 5-ethoxycarbonylcyclopent-2-en-1-ones (6) by [3+2]-annulation reaction in the presence of a base. Compounds 6 were easily converted to 2-substituted cyclopent-2-en-1-ones by deethoxycarbonylation. An application of the annulation to synthesis of cis-jasmone is also described.