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Volumn 12, Issue 11, 2006, Pages 3006-3019

Platinum- and gold-catalyzed rearrangement reactions of propargyl acetates: Total syntheses of (-)-α-cubebene, (-)-cubebol, sesquicarene and related terpenes

Author keywords

Carbenes; Gold; Natural products; Platinum; Terpene

Indexed keywords

GOLD; HYDROCARBONS; HYDROGENATION; OXIDATION; PLATINUM; SOLVENTS; STEREOCHEMISTRY; SUBSTRATES; TOLUENE; TRANSITION METALS;

EID: 33645688330     PISSN: 09476539     EISSN: 15213765     Source Type: Journal    
DOI: 10.1002/chem.200501299     Document Type: Article
Times cited : (254)

References (165)
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    • Other methods for the introduction of the side chain have been briefly explored but remained largely unsuccessful. This includes attempted alkylation of the vinyllithium species derived from the sulfonyl hydrazone of carvomenthone 17, with or without prior transmetalation to a vinylcopper species.
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    • As such, compound 30 constitutes the nor-ketone of 6-epi-cubebene, a natural product that was isolated only recently from the essential oils of Solidago canadensis, see: A. A. Kasali, O. Ekundayo, C. Paul, W. A. König, Phytochemistry 2002, 59, 805-810.
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    • It should be noted, however, that these data do not allow us to conclude that it is the only pathway that is operative; at least theoreti cally, the possibility remains that both pathways are populated to some extent.
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    • A related approach to the carene family has been published after our preliminary communication (ref. [15]) although the natural products per se have not been prepared, see ref. [4b].
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    • Although two consecutive acetyl migrations via intermediates such as B and C could also explain the formation of the allenyl acetate 34, previous literature reports generally assume a [3,3]-sigmatropic pathway for reactions of this type, see ref. [48].
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    • 6.
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    • Other conceivable methods for the dehydration of alcohol 37 gave much more complex product mixtures.
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    • note
    • 3N as hydride sources led to somewhat lower yields in this particular transformation (60 and 41 %, respectively).
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    • It is worth mentioning that isosequicarene, a natural product isolated from Haplopappus tenuisectus, shows this particular configuration at C-7 but has a 3-carene rather than a 2-carene core, see: T. Uyehara, J. Yamada, T. Kato, F. Bohlmann, Bull. Chem. Soc. Jpn. 1985, 58, 861-867.
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.