AbstractIn the essential oil of Juniperus communis L. (fruit), the title compound (trans‐ isomer) has been identified; its structure being confirmed by synthesis from elemol. The optical rotation of the natural compound was nearly the same as the synthetic sample, suggesting that it is not an artefact formed from a ten‐membered ring precursor during the isolation.
New Olefinic Cyclizations by Oxymetallation. Conversion of (?)-elemol to (?)-selina-4?, 11-diol (cryptomeridiol) and (?)-guai-1 (10)-ene-4?, 11-diol
作者:Walter Renold、G�nther Ohloff、Torbj�rn Norin
DOI:10.1002/hlca.19790620409
日期:1979.6.8
Acetoxythallation of (−)-elemol acetate (1b) yields a diacetate 2b which after treatment with lithium aluminium hydride gives (−)-guai-1 (10)-ene-4α, 11-diol (2a). (−)-Elemol (1a) is converted to (−)-selina-4α, 11-diol (9, cryptomeridiol) by hydroxymercuration followed by reductive demercuration. (+)-γg-Elemene (5) similarly yields (+)-selin-7(11)-en-4α-ol (11, juniper camphor). The stereochemistry
Pyrolysen- und Hydrierungsversuche in der Elemol- und Dihydrogeijeren-Reihe
作者:C. Ganter、Frau B. Keller-Wojtkiewicz
DOI:10.1002/hlca.19710540117
日期:——
AbstractThe pyrolysis of elemol (1) in the presence of benzoic or p‐nitrobenzoic acid, and of elemyl‐p‐nitrobenzoate (3) was studied. From the many products formed, the compounds 6, 7, 8, 10, 11, 14, 15 and 18 were isolated and identified. On the basis of systematic experiments in the elemol (1) and dihydrogeijerene (26) series the sequence of the formation of these products could be determined. Several factors influencing the compositions of the pyrolysis mixtures are discussed.The products of pyrolysis of both series [elemol (1) and dihydrogeijerene (26), respectively] were catalytically hydrogenated, yielding the saturated hydrocarbons 34, 35–37, and 38–40, respectively.The synthesis of racemic dihydrogeijerene (26) was achieved starting from germacrone (41).
Reijnders, Peter J. M.; Putten, Rob G. van; Haan, Jan W. de, Recueil des Travaux Chimiques des Pays-Bas, 1980, vol. 99, # 2, p. 67 - 69
作者:Reijnders, Peter J. M.、Putten, Rob G. van、Haan, Jan W. de、Koning, Henk N.、Buck, Henk M.
DOI:——
日期:——
Kato,M. et al., Journal of the Chemical Society. Perkin transactions I, 1979, p. 2740 - 2743