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Synthesis 1994; 1994(9): 893-894
DOI: 10.1055/s-1994-25593
short paper
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Synthesis of (3aR*,6aR*)-2,2,5,6-Tetramethyl-1,2,3,3a,4,6a-hexahydropentalene: A Potential Precursor of Protoilludane Sesquiterpenes

Lutz Fitjer* , Ralf Gerke, Thorsten Anger
  • *Institut für Organische Chemie der Universität Göttingen, Tammannstraße 2, D-37077 Göttingen, Germany
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Publikationsdatum:
17. September 2002 (online)

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Acid-catalyzed rearrangement of 3,3,3′,3′-tetramethyl-1,1′-bi(cyclobutylidene) (8) results in the formation of (3aR*,6aR*)-2,2,5,6-tetramethyl-1,2,3,3a,4,6a-hexahydropentalene [(3aR*,6aR*)-9], a potential precursor of protoilludane sesquiterpenes. Compound 8 is prepared by oxidation and in situ coupling of cyclobutylidenephospborane 7.