Column and Gas Chromatographic Analysis of Oil of Wild Ginger: Identification and Estimation of Some New Constituents

Abstract

Oil of wild ginger was found t o contain the following as yet unreported constituents: p-pinene, A3-carene, j3-caryophyllene, ar-curcumene, linalool, borneol, and a-terpineol. The presence of three ketones, one of them readily generated during gas chromatographic analysis from a non-ketonic sesquiterpenoid, was also demonstrated. Formation of a sesquiterpene alcohol as a compositional artefact of the oil occurred during column chromatography over alumina.

Chemical investigation of the leaf and rhizome essential oils of Zingiber zerumbet (L.) Smith from Bangladesh

“…But it is very interesting to note that comparison of our results reported on the leaf oil composition from the different places showed different results in the percentage content of some of the major and minor constituents. Zerumbone and -caryophyllene, which have been reported as major constituents in our oils as well as in almost all the leaves and rhizomes oils of the world (Vahirua et al, 1993;Dung et al, 1993;Chane et al, 2003;Srivastava et al, 2000;Chhabra et al, 1975;Duve, 1980;Nigam and Levi, 1963) were either absent or present in trace amounts in the oil reported. This confirms that the variations in the cultivar reported are not due to geographic divergence and ecological conditions but that is due to different chemotype than ours.…”

“…Dev (1960) isolated and determined the structure of zerumbone. Nigam and Levi (1963) identified, among other constituents, -humulene, zerumbone, and humulene monoxide. characterized humulene oxides I, II and III, humulenols I and II, caryophyllene oxide, -caryophyllene, dihydrophotozerumbone and photo-zerumbone.…”

High content of zerumbone in volatile oils of Zingiber zerumbet from southern India and Malaysia

“…Gas chromatographic estimations of Z. zerumbet rhizome oils found zerumbone content(s) in the range 12.6-73.1%. [16][17][18][19][20][21][22][23][24][25]34] However, previous studies reported a maximum of only 38% zerumbone in Z. zerumbet rhizome oils from India (Table 2). [22,27,34] Z. zerumbet rhizome oils from Tenom, East Malaysia, and Quang Ninh Province, Vietnam, reported 73.1% and 72.3% of zerumbone, respectively [20,25] , but most previous studies have found a lower concentration of zerumbone in Z. zerumbet rhizome oils (Table 2).…”

“…[16][17][18][19][20][21][22][23][24][25]34] However, previous studies reported a maximum of only 38% zerumbone in Z. zerumbet rhizome oils from India (Table 2). [22,27,34] Z. zerumbet rhizome oils from Tenom, East Malaysia, and Quang Ninh Province, Vietnam, reported 73.1% and 72.3% of zerumbone, respectively [20,25] , but most previous studies have found a lower concentration of zerumbone in Z. zerumbet rhizome oils (Table 2). [16][17][18][19][20][21][22][23][24][25]34] None of the previous studies on Z. zerumbet rhizome oil mentioned the observation of crystals during distillation.…”

Essential oils and their constituents. XLII. Isomerization of epoxides on active alumina

“…Experimental humulene oxide and caryophyllene oxide undergo Preparation of Epoxides of Linzorzene, a-Pirlet~e, and characteristic isomerizations to unsaturated Caryophyllene The hydrocarbons were allowed to react with equiduring chromatography On molar amounts of perphthalic acid in ether solution for alumina (1,2). Similar findings were made the rearrangement of trans-cyclodecene epoxide to an allylic alcohol during chromatography over strongly activated alumina (4).…”