Transformations of geraniol in aqueous acid solutions
作者:K.L. Stevens、L. Jurd、G. Manners
DOI:10.1016/0040-4020(72)88001-3
日期:1972.1
Geraniol decomposition in aqueous oxalic acid yields twenty-three identified products, most of which retain the oxidation level of geraniol and result from simple hydration and proton-transfer reactions. However, a large quantity of the reduced alcohol, citronellol, is formed along with cymenol, the oxidation product of α-terpineol, indicating that hydride ion transfer reactions play a major role in
Process for the catalytic synthesis of conjugated dienes from
申请人:Givaudan Corporation
公开号:US04467118A1
公开(公告)日:1984-08-21
There is disclosed a novel process for converting allylic amines, having a hydrogen bonded to a carbon .delta. to the amino group, to a diene in the presence of a zero valent palladium phosphine complex and a weak acid. The process has been used to make novel compositions containing 7-methoxy-3,7-dimethyloctadienes which are useful as odorants and flavorants.
Unraveling the Enantiomeric Distribution of Glycosidically Bound Linalool in Teas (<i>Camellia sinensis</i>) and Their Acidolysis Characteristics and Pyrolysis Mechanism
transformation relationship existed between the two states of linalool for their consistent dominant configurations (most S-form) and corresponding distribution trend in most teas (r up to 0.81). The acidolysis characterization indicated that free linalool might be slowly released from linalyl-β-primeveroside with stable enantiomeric ratios during long-term withering of white tea in a weakly acidic environment
Synthesis of furanoid terpenes via an efficient palladium-catalyzed cyclization of 4,6-dienols
作者:Pher G. Andersson、Jan E. Baeckvall
DOI:10.1021/jo00018a027
日期:1991.8
The total syntheses of marmelo oxides A and B and a terpene alcohol found in peppermint oil are described. The key steps in these syntheses are the regioselective palladium-catalyzed allylic substitution of 4 and 11 to 6a and 12, respectively, and the regioselective palladium-catalyzed cyclization of 8 and 14 to 9a, 9b, and 15, respectively. The relative stereochemistry of marmelo oxides A and B was established by NOE measurements.
Ohloff,G. et al., Justus Liebigs Annalen der Chemie, 1964, vol. 675, p. 83 - 101