Tomikazu Kawano, K. Negoro, I. Ueda
Nov 24, 1997
Citations
0
Influential Citations
2
Citations
Journal
Tetrahedron Letters
Abstract
Abstract N-methyl-2-oxazolidinones (4) are obtained stereo- and regio-selectively when 3-ethoxy-6-(N-methyl-N-tert-butoxycarbonyl)amino-2,4-hexadienoates (1) are treated with concentrated sulfuric acid (1.0 equiv.) supported on silicagel in dichloromethane at 0 °C. 4 were shown to be intermediates for the construction of N-methylpyrrole ring. The structure and properties of 4 and related compounds are also described.