Tetrahedron Letters p. 4581 - 4584 (1992)
Update date:2022-09-26
Topics:
Toyota, Masahiro
Seishi, Takashi
Yokoyama, Masaharu
Fukumoto, Keiichiro
Kabuto, Chizuko
The tetracyclic compound 18, possessing the stemodane skeleton, was synthesized from 1,4-cyclohexanedione monoethylene ketal 7. The key steps, 6→5 and 16→18, involve intramolecular Diels-Alder reaction.
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(1951)