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Synthesis 1989; 1989(12): 965-967
DOI: 10.1055/s-1989-27450
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Einfache Synthese neuer anellierter Pyrrole

Jürgen Martens* , Stefan Lübben, Irmtraud Behrens, Ralf Janke
  • *Fachbereich Chemie, Universität Oldenburg, Postfach 2503, D-2900 Oldenburg i. O., Federal Republic of Germany
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Publikationsdatum:
02. Mai 2002 (online)

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A Simple Synthesis of New Ring-Fused Pyrroles (2S,4R)-4-Hydroxy-N-[(2R,S)-2-hydroxyalkyl]prolines are converted into 3-alkyl-1-oxo-3,4-dihydro-1H-pyrrolo[2,1-c]oxazines in the presence of air and catalytic amounts of trifluoroacetic acid. Similar treatment of (2S,4R)-4-hydroxy-N-[(2R,S)-2 -hydroxycyclohexyl]prolin affords 4-oxo-5a,6,7,8,9,9a-hexahydro-4H -pyrrolo[2,1-c]benzoxazine.