Synthesis 1985; 1985(8): 796-798
DOI: 10.1055/s-1985-31355
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Synthesis of 7-Substituted 5,6-Dimethyl-2,4-dioxo-1,2,4,7-tetrahydropyrrolo[2,3-d][1,3]oxazines

John R. Ross* , JoAnn S. Laks, Daniel Li-Chang Wang, J. Walter Sowell, Sr.
  • *Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of South Carolina, Columbia, South Carolina 29208, U.S.A.
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Publikationsdatum:
17. September 2002 (online)

The title compounds 2 are prepared by the cyclization of substituted pyrroles 3 with phosgene in refluxing tetrahydrofuran. In the case of 3a, it is shown that the cyclization can also be achieved after alkylation to give 8.