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Volumn 72, Issue 4, 2007, Pages 1112-1120

Cyclization of 1,5-dienes: An efficient synthesis of β-Georgywood

Author keywords

[No Author keywords available]

Indexed keywords

CARBONYL GROUP; CYCLIZATION REACTIONS; LEWIS ACIDS;

EID: 33846976722     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo061668k     Document Type: Article
Times cited : (17)

References (71)
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    • This hypothesis represents so far the best answer to the important question, why Brønsted acids induce preisomerization and strong, active LA's do not. We also considered an inductive deactivation of the cyclohexenyl double bond depending on the strength of the carbonyl group/acid complex. Although we could not find a well-proven precedent for a deactivation over three σ-bonds, such an effect cannot be excluded.
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    • Alkynol 26 also can be prepared from Dehydro-β-linalol (CAS 29171-20.-8) by using the 3-step procedure described by Glänzer: Glänzer, B. I.; Faber, K.; Griengl, H. Tetrahedron 1978, 43, 5791-5796.
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    • We cannot exclude that backside shielding of the α-face of 25 by the isohexenyl side chain, probably favored by π-stacking in analogy to Figure 3, is solely responsible for this preference
    • We cannot exclude that backside shielding of the α-face of 25 by the isohexenyl side chain, probably favored by π-stacking (in analogy to Figure 3), is solely responsible for this preference.
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    • 2 have also been used successfully in reactions such as Cycloalkylation, intramolecular Diels-Alder, epoxide-initiated cation-olefin cyclization, aldol condensation, carbocationic cyclization of unsaturated carbonyl compounds, and carbonyl ene reactions. See, for example: (a) Abouabdellah, A.; Bonnet-Delpon, D. Tetrahedron 1994, 50 11921-11932.
    • 2 have also been used successfully in reactions such as Cycloalkylation, intramolecular Diels-Alder, epoxide-initiated cation-olefin cyclization, aldol condensation, carbocationic cyclization of unsaturated carbonyl compounds, and carbonyl ene reactions. See, for example: (a) Abouabdellah, A.; Bonnet-Delpon, D. Tetrahedron 1994, 50 11921-11932.
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