摘要:

AbstractFrom cyclooctanone(1)and cyclododecanone(2)the spiro ethers18–23were prepared via the yne‐diols6–11and the ene‐diols12–17.Hydrogenation of21–23leads to the spiro tetrahydrofurans24–26.Olfactive evaluation showed that the odour of18(camphor, fresh, green) is very similar to that of the unsubstituted analogueB(R1, R2= H). This can be explained by a similar steric situation of the osmophoric dihydrofuran ring in both these compounds. Increasing substitution at C‐2(18 → 19 → 20)diminishes the camphoraceous sensation stepwise with increasing herbaceous notes. The macrocyclic spiro ethers21–23exhibit interesting woody fragrances with different undertones. Particularly,22is most pleasant with some powdery, balsamic and musk notes. The saturated spiro ethers24–26smel

ISSN:0882-5734    

DOI:10.1002/ffj.2730070102

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

摘要:

AbstractAnalysis of acid and enzymic hydrolysates of maple (Acer saccharumMarshall) sap and syrup confirmed the presence of vanillin glucoside as a precursor of vanillin in maple syrup. Vanillin glycoside was present at a concentration of about 5 ppm in vacuum‐concentrated maple syrup. About 20% of the bound vanillin in vacuum concentrated maple syrup was released by either β‐glucosidase or hesperidinase during extended incubations (>14 h at 40°C). Small variations in vanillin glycoside concentrations were associated with size of tree and harvest time during the s

ISSN:0882-5734    

DOI:10.1002/ffj.2730070103

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

摘要:

AbstractA rapid method for the detection of the addition of reconstituted bergamot oils to natural bergamot essential oils is suggested. The method is based on the ratio of the two enantiomers of linalol determined by gas chromatography with chiral capillary columns.

ISSN:0882-5734    

DOI:10.1002/ffj.2730070104

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

摘要:

AbstractThe chemical composition of the essential oils from the rhizomes of fiveCurcumaspecies from Indonesia and India was examined by GC‐MS. The oils can be characterized by the following compounds:C. xanthorrhizaRoxb.:ar‐curcumene (41.4%), xanthorrhizol (21.5%);C. domesticaVal.:ar‐turmerone (24.7%), turmerone (29.5%), turmerol (20.0%), α‐atlantone (2.4%);C. aromaticaSalisb.:ar‐curcumene (18.6%), β‐curcumene (25.5%), xanthorrhizol (25.7%);C. aeruginosaRoxb.: isocurcumenol (8.5%), β‐eudesmol (6.5%), curdione (3.6%), curcumenol (9.9%), curcumanolides A,B (11.4%), dehydrocurdione (9.4%), curcumenone (1.9%);C. heyneanaVal.: 1,8‐cineole/limonene (14.2%), isocurcumenol (7.4%), β‐eudesmol (4.7%), curcumanolides A,B (13.1%), dehydrocurdione (10.2%

ISSN:0882-5734    

DOI:10.1002/ffj.2730070105

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

摘要:

AbstractThe needle essential oil of Norwegian mountain juniper, Juniperus communis L. var.saxatilisPall., was investigated by headspace capillary gas chromatography. The average ratio of α‐pinene: sabinene: limonene was generally 21:45:5 (n= 25). However, at two rather cold and weatherbeaten habitats some shrubs were found with quite different ratios of these compounds, viz. 42:24:7 (n= 1) and 51:>1:24 (n= 5), and 82:>1:4 (n= 2) and 53:20:2 (n= 3), respective

ISSN:0882-5734    

DOI:10.1002/ffj.2730070106

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

摘要:

AbstractThe steam volatile leaf oils ofMelaleuca cordataTurcz.,M. halmaturorumF. Muell. ex Miq. subsp.cymbifolia(Benth.) Barlow,M. incanaR.Br.,M. lanceolataOtto subsp.planifoliaBarlow,M. rhaphiophyllaSchauer,M. sheathianaW. Fitzg,M.sp.aff.sheathianaandM. uncinataR.Br.sensu latowere analysed by GC‐MS. The oils were entirely terpenoid with the exception ofM. halmaturorumvar.cymbifoliawhich contained small amounts of baeckeol. Whilst 1,8‐cineole was a major constituent of most oils, terpinen‐4‐ol was the chief constituent ofM. unci

ISSN:0882-5734    

DOI:10.1002/ffj.2730070107

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

摘要:

AbstractThe essential oil of one of the cultivars ofPlumeria rubraL. ‘Irma Bryan’ growing in Hawaii was extracted by simultaneous distillation and extraction (SDE). The essential oil was analysed with GC and GC‐MS, and a total of 67 compounds were identified. β‐Phenylethyl alcohol, phenylacetaldehyde and methyl cinnamate were found to make a major contribution to the floral spicy scent of thi

ISSN:0882-5734    

DOI:10.1002/ffj.2730070108

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

摘要:

AbstractThe essential oils from severalSantolina chamaecyparissusL. subspecies from wild (Spanish insular and peninsular) and cultivated (Spanish and British) populations have been examined. According to the composition of the volatiles three different groups are proposed: cultivated, insular, and peninsular samples. Artemisia ketone (27.8–35.6%) and T‐cadinol (23.6–4.8%) were characteristic components in cultivated samples, whereas in the insular ones camphor (42.9%) and cubenol (17.3%) were the main compounds. Monoterpenes predominated in the essential oils of peninsular populations corresponding to subspeciesincana(85.9%) andsquarrosa(45.2–68.5%), of which camphor (9.2–24.9%), borneol (11.6–28.4%) and 1,8‐cineole (2.3–8.7%) were the major components. Conversely, the essential oil of subspeciestomentosawas mainly composed of sesquiterpenes (61.4%), elemol (5.0%), nerolidol + spathulenol (9.3%), copaenol (15.2%), ledol (4.1%) and cubenol (6.7%) being the m

ISSN:0882-5734    

DOI:10.1002/ffj.2730070109

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

摘要:

AbstractThe volatile constituents ofSatureja parnassicaHeldr.&Sart. ex Boiss subsp.sipyleaP. H. Davis (Lamiaceae) were studied for the first time. 47 Compounds, out of 67 detected, have been identified by means of capillary GC and GC‐MS. The identified components represent about 95.5% of the oil. The major constituents found were carvacrol (49.9%) andp‐cymene (20.1%). In addition 33.7% terpene hydrocarbons, 6.4% monoterpenic alcohols, and 1.6% sesquiterpene hydrocarbons were pres

ISSN:0882-5734    

DOI:10.1002/ffj.2730070110

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY

摘要:

AbstractThe essential oil from two samples ofSideritis pauliPau has been studied by GC, GC‐MS and IR after preparative GC. Forty‐two components have been identified in the volatile oils, and α‐pinene (48.0%) is the maj

ISSN:0882-5734    

DOI:10.1002/ffj.2730070111

出版商:John Wiley&Sons, Ltd.    

年代:1992

数据来源: WILEY