Bomyl acetate

One of the distinguishing features of liverworts is their capacity to produce a variety of volatile, often very fragrant, oils that occur in oil bodies distributed over much of the surface of the organism. Several of these volatile compounds figure prominently in defining geographically different chemotypes in several countries. Toyota et al. (1997) examined 280 specimens of C. conicum collected at Kamikatsu-cho and Katsuura-cho, both Katsuura-gun, Tokushima. Three chemotypes were identified based upon their major components. Chemotype-I-accumulated (-)-sabinene [420], chemotype-II-accumulated (H-)-bomyl acetate [421], and chemotype III was characterized by methyl cinnamate [422] (see Pig. 5.4 for structures). In addition to a number of compounds known from previous studies of C. conicum, three... 

To identify the volatile components, gas chromatography-mass spectrometry (GC-MS) is still the method of choice. A comparison of the GC fingerprints of B. carter a and B. serrata reveals the different composition of the volatile fractions (Figure 16.1). Common monoterpenes, aliphatic, and aromatic compounds of olibanum are, e g., pinene, limonene, 1,8-cineole, bomyl acetate, and methyleugenol (Figure 16.2). 

In principle, separation of resonances of diastereomeric compounds (such as dl and meso isomers) may be increased simply through use of an appropriate achiral solvent. Chiral solvents may in some cases be especially effective in producing a separation, particularly if the diastereomers differ in configuration about a center that is amenable to analysis by the CSA method. Kaehler and Rehse (89) give a detailed account of conditions necessary for measurement of the ratio of meso- and dZ-tartaric acid employing A,N-dimethyl PEA. Bomyl acetate used as solvent for l,2-difluoro-l,2-dichloroethane (90) allows measurement of the diastereomeric composition. Paquette and co-workers (91,92), using TFAE, were able to determine the diastereomeric purity of the recrystallized adducts 47 of... 

Bornyl acetate [5655-61-8] is a characteristic component of most conifer oils. It has a camphoraceous, pine-needle-like odor. Both (+)-bornyl acetate [20347-65-3] and (-)-bornyl acetate form colorless crystals the racemate [36386-52-4 ] is a colorless liquid. Bomyl acetate is prepared by esterification of borneol with acetic anhydride or via the process described under borneol (see p. 59). 

Due to its characteristic pine-needle odor, bomyl acetate is frequently used in conifer needle compositions, soap, bath products, room sprays, and pharmaceutical products. 

Thymus vulgaris L. She Xiang Cao (Thyme) (aerial part) Tymol, terpinen-4-ol, pinenes, camphene, myrcene, alpha-phellandrene, limonene, 1,8-cineol, p-cymene, linalool, linalyl acetate, bomyl acetate, alpha-terpinyl acetate, alpha-terpineol, borneol, citral, geraniol, carvacrol.50 510 Anthelmintic, antispasmodic, carminative, diaphoretic, sedative. Treat bronchitis, cancer, diarrhea, gastritis, rheumatism, skin ailments. 

Despite the mechanistic obscurity of C-H bond oxidation by chromic acid, regio-selectivity has been discerned in well defined systems [256]. For example, oxidation of enrfo-fenchyl acetate and the bomyl acetates (exo and endo) gives ketones in which the new carbonyl group is derived from a donor carbon. 

An important step toward the correct identification of the sex pheromone of P. americana was the identification of several phytochemicals, such as bomyl acetate and santalol, that stimulated courtship behavior in males (Bowers and Bodenstein, 1971 see p. 196). Some years later, Tahara etal. (1975) and Kitamuta et al. (1976) reported that germacrene-D, extracted from composite plant species, stimulated sexual behavior in males of P. americana and the Japanese cockroach Periplaneta japonica Karny. Persoons etal. (1974, 1976) determined, on the basis... 

Pineapple Allyl capruale, cyclohexylacetaie. cyclohexylbutyrate, cyclohexylptopionate. 2-nonylenate, phenoxyacetate Benzyl formate Bomyl acetate n-Bulyl acetate Butyl isobutyrate Cinnamyl acetate Decanal dimethyl acetal Ethyl butyrate, hexadienoate. phenoxyacetate Hexyl butyrate 2-Methylallyl capruale Methyl heia-methy Ipropionaie Methyl undecylate Propyl isobutyrate. 

The ester number for any essential oil may vary within more or less wide limits (see Table XXXIV), but its determination is of importance in the identification of an oil, the detection of adulteration, and for judging of the quality of the oil. With some oils, the esters represent the odoriferous principle, e.g., linalyl acetate in bergamot, lavender and petit-grain oils, bomyl acetate in pine-needle oil and menthyl acetate in mint oil, the value of these Oils being deduced from the ester content. 

Pinene, 1-limonene, cadinene, phellandrene, sesquiterpenes, bomyl acetate (4-11%) Oil of turpentine, petroleum... 

Pinene, sylvestrene, cadinene, bomyl acetate Oil of turpentine... 

Bomeol (16-19%), bomyl acetate ( ) (5-6%), camphor, cineol, pinene, camphene Oil of turpentine, oil of camphor, mineral oils... 

Identification The infrared absorption spectrum of the sample exhibits relative maxima at the same wavelengths as those of a typical spectmm as shown in the section on Infrared Spectra, using the same test conditions as specified therein. Assay Not less than 32.0% and not more than 44.0% of esters, calculated as bomyl acetate (C12H2o02). 

In the case of the transformation of bomyl acetate (43) by Fusarium culmorum it is interesting to note that both enantiomers of the substrate yielded only the 5-ejco-hydroxybomyl acetate as the major product. 

Bomyl acetate, purchased Ifom Aldrich Chemical Company, Inc., was of 97% purity and was... 

A Digi-Sense digital thermometer was used. The internal temperature needs to be monitored, and the additions should be slow enough to avoid significant exotherms. The checkers found that temperature control is the major factor influencing the outcome of the reaction. The initial procedure was submitted as double scale i.e. 11 g (56.2 mmol) (-)-bomyl acetate]. However, the checkers found temperature control on full scale to be difficult, resulting in incomplete reaction and/or over-reduction of the bomyl acetate. The checkers found that the procedure is reliably reproducible on half scale (5.5 g (-)-bomyl acetate). 

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