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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1990 (1990), S. 63-68 
    ISSN: 0170-2041
    Keywords: Michael addition, aprotic ; [2 + 2] Addition ; Bicyclo[2.2.2]octanes ; Tricyclo[5.3.1.03,8]undecanes ; Sesquiterpene synthesis ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis of (±)-2-Oxo-seychellene and (±)-2-Oxo-4-epi-seychelleneAprotic Michael additions, which generate the functionalized bicyclo[2.2.2]octane 8 from ethyl 2-methyl-2,3-butadienoate (10) and the lithium cyclohexadienolate 9a, are the key steps in the synthesis of 6 (and its 4-epimer). 6 was made from 8 in 10 steps. The alternative Diels-Alder reaction of 10 with the trimethylsiloxycyclohexadiene 9b gave exclusively the [2+2] adduct 14 as a 1:1 mixture of diastereomers.
    Type of Medium: Electronic Resource
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