Methyl 14 hexadecanoic acid

Methyl-hexadecanoic acid (anteisomargaric acid) aM 17 0 anteiso 269.2... 

Diiren) into the methyl esters. The analysis by gas chromatography was carried out with a Hewlett-Packard Type 5750 on columns of Reoplex and ethylenglycol succinate (6). For the identification we used authentic fatty acids, as a 16-methyl-heptadecanoic acid and a I4-methyl-hexadecanoic acid isoplated by Hansen et al. (2,3). For the isolation of the methyl branched components the unsaturated components were separated from the fatty acids mixture via their adducts with mercury Il-acetate. Subsequently we cristallized the branched chain acids via their urea adducts from the mixture of the n-fatty acids (1). 

The occuring methyl branched fatty acids are characterized, due to their behaviour in the comparatitive GLC with the authentic 16-methyl-heptade-canoic and the 14-methyl-hexadecanoic acid (2,3) and due to IR, NMR spectroscopy and the measurement of optical activity as being mono-methyl-... 

The fatty acid content is given as per cent of the total fatty acid content of the respective phospholipids. The iso-acids were identified by their retentions times in GLC to have the following chain lengths lO-methyl-undecanoic acid (iso-lauric) 12-methyl-tridecanoic acid (iso-iayristic)j 14-methyl-pentadecanoic acid (iso-palmitic) 16-methyl-heptadecanoic acid (iso-stearic) 20-methyl-heneicosanoic acid (iso-behenic). The anteiso-acids were 12-me-thyl-tetradecanoic acid 14-methyl-hexadecanoic-acid 16-methyl-octadecanoic acid 19-methyl-heneicosanoic acid. 

Several syntheses of natural products have been achieved with EHs as the key steps to introduce chirality. One of the first was the synthesis of the biologically active enantiomer of disparlure, the sex pheromone of the moth Lymantria dispar, which causes severe damage to trees in some parts of the world [159]. The synthesis was based on the kinetic resolution, mediated by a Pseudomonas strain, of rac-9,10-epoxy-15-methyl hexadecanoic acid, a precursor of the pheromone. The residual epoxide was then chemically converted in a Kolbe reaction into (+)-disparlure in 95% ee (Figure 8.41). 

Acylation of mesoionic pyrido[l,2-u]pyrimidin-4-ones 150 with aroyl chlorides in the presence of NEts yielded 2-aroyloxy-4//-pyrido[l,2-u]pyrimidin-4-ones 178 (96JHC663). None of the esters 178 could be rearranged to the 2-hydroxy-3-aroyl derivatives 179. The hydroxy group of 9-hydroxy-2-methyl-3- 2-[4-(6-fluoro-l,2-benzisoxazol-3-yl)-l-piperidinyl] ethyl -6,7,8,9-tetrahydro-4//-pyrido[l, 2-u]pyrimidin-4-one was acylated with hexadecanoic acid in CH2CI2 in the presence of dicyclohexylcarbodi-imide and 4-pyrrolidinopyridine at room temperature for 3 days in 80% yield (97MIP7). 

Figure 11.1 Py/methylation GC/MS chromatograms of lead white pigmented linseed oil paint after 610 °C Curie point pyrolysis assisted with on line methylation using 2.5% methanolic TMAH (the sample and TMAH solution was applied onto a rotating Curie point wire pyrolysis time 6 s, interface 180°C). 1, heptenoic acid, methyl ester 2, heptanoic acid, methyl ester 3, butenedioic acid, dimethyl ester 4, butanedioic acid, dimethyl ester 5, octenoic acid, methyl ester 6, octanoic acid, methyl ester 7, pentenedioic acid, dimethyl ester 8, pentanedioic acid, dimethyl ester 9, nonanoic acid, methyl ester 10, hexanedioic acid, dimethyl ester 11, decanoic acid, methyl ester 12, heptanedioic acid, dimethyl ester 13, octanedioic acid, dimethyl ester 14, 1,2 benzenedicarboxylic acid, dimethyl ester 15, a methyl octanedioic acid, dimethyl ester 16, nonanedioic acid, dimethyl ester 17, a methoxy octanedioic acid, dimethyl ester 18, a methyl nonanedioic acid, dimethyl ester 19, a,a dimethyl nonenedioic acid, dimethyl ester 20a, a methyl nonenedioic acid, dimethyl ester 20b, a,a dimethyl nonanedioic acid, dimethyl ester 21, decanedioic acid, dimethyl ester 22, a methoxy nonanedioic acid, dimethyl ester 23, a methyl decan edioic acid, dimethyl ester 24, undecanedioic acid, dimethyl ester 25, a methoxy decan edioic acid, dimethyl ester 26, pentadecanoic acid, methyl ester 27, dodecanedioic acid, dimethyl ester 28, hexadecanoic acid, methyl ester 29, heptadecanoic acid, methyl ester 30, octadecanoic acid, methyl ester 31,8 methoxy 9 octadecenoic acid, methyl ester 32, 11 methoxy 9 octadecenoic acid, methyl ester 33, 9 methoxy 10 octadecenoic acid and 10 methoxy 8 octadecenoic acid 34, 9 oxo octadecanoic acid, 10 oxo octadecanoic acid 35, 9 epoxy octadecanoic acid 36, eicosanoic acid, methyl ester 37, 9,10 dimethoxy octadecanoic acid, methyl ester 38, docosanoic acid, methyl ester. Reprinted from J. Anal. Appl. Pyrol., 61, 1 2, van den Berg and Boon, 19, Copyright 2001, with permission from Elsevier...

Enantiomers of 2,7-dimethyl-l,6-dioxaspiro[4.5]decane 28 Enantiomers of 2-Ethyl-7-methyl-l,6-dioxaspiro[4.5]decane 29 Enantiomers of 2,8-dimethyl-l,7-dioxaspiro[5.5]undecane 30 5 - Methylh eptan - 2 -ol (Z)-Non-3-en-l-ol 3,7-Dimethyloctan- l-ol Benzaldehyde 2-Phenylethanol Phenylacetonitrile Isobutyl benzoate Isopentyl benzoate Hexadecanoic acid 17-Hydroxyan drost-4-en-3-one (2)-Octadec-9-enoic acid... 

Analyses of methanolic extracts of the male webbing clothes moth (WCM), Tineola hisselliella (Hum.) (Lepidoptera Tineidae) showed three candidate pheromone components namely, hexadecanoic acid methyl ester, (.Z)-9-hexadecenoic acid methyl ester, and octadec-anoic acid methyl ester. In bioassay experiments, the 16 carbon esters were attractive to both males and virgin females but the 18 carbon ester was inactive. The extracts of female WCM showed two compounds as candidate sex pheromone components, namely (T, )-2,13-octadecadienal and E,Z) 2,13-octadecadienol. The synthetic samples of the aldehyde and alcohol were attracting WCM males in bioassay experiments successfully ... 

Heterodendrin, epi Epidermis Hexadecanoic acid methyl ester Lf 078 Hor V 9 P1HV164 Hordein B Caryopsis ... 

Phytanic acid-d3 (3-methyl-2H3-7,11,15-trimethyl) hexadecanoic acid. 

Palmitic acid (hexadecanoic acid) [57-10-3] M 256.4, m 63-64 . Crystd from EtOH. Purified via the methyl ester (b 193-194°/ 12mm, n 1.4359) as for capric acid, or by zone melting. 

Quantitative changes in lipid compounds on the silk and cuticle of females correlate significantly with changes in female sexual receptivity in spiders. For example, female T. atrica attach a contact sex pheromone to their web (Trabalon et al., 1997,2005 Prouvost et al., 1999). This pheromone consists of a complex mixture of saturated hydrocarbons, methyl esters (methyl tetradecanoate, methyl pentadecanoate, methyl hexadecanoate, and methyl octadecanoate) and their fatty acids (tetradecanoic, pentadecanoic, hexadecanoic, and cis,cis-9,12-octadecadienoic acids). The female uses cuticular compounds, which are applied to the silk in substantial amounts during web construction. Modification of chemical profiles makes the female attractive to males (Trabalon et al., 2005). Receptive females are different to unreceptive ones with respect to three fatty acids (hexadecanoic, octadeca-dienoic and octadecenoic acids) and three methyl esters (linoleate, oleate, and stearate) present on both the web and the cuticle. Our combined results from chemical analyses and behavioral assays demonstrate clearly that these contact compounds are quantitatively correlated with the behavior of spiders. 

Isoprene 1,3-Butadiene, 2-methyl- Palmitic acid Hexadecanoic acid... 

Fig. 2. Chemical structures of typical slick-forming compounds, a.) oleyl alcohol (Z-9-octadecen-l-ol OLA), b.) oleic acid methyl ester (methyl Z-9-octadecenoate OLME), and c.) methyl palmitate (methyl hexadecanoate PME)...

F.36) (F.36) Hexadecanoic acid, methyl ester, methyl palmitate, methyl hexadecanoate 1112-39-0]... 

AI3-03509 EINECS 203-966-3 Emery 2216 Hexadecanoic acid, methyl ester n-Hexadecanoic acid methyl ester HSDB 5570 Metholene 2216 Methyl hexadecanoate Methyl n-hexadecanoate Methyl palmitate NSC 4197 Palmitic acid, methyl ester Radia 7120 Uniphat A60 Emery 2216 Radia 7120. Chemical intermediate, chemical synthesis lubricant in mineral, cutting, lamination, textile oils, and rust inhibitors textile and leather application. Used as a chemical intermediate, chemical synthesis lubricant in mineral, cutting, lamination, textile oils, and rust inhibitors textile and leather application. Solvent for pesticides and herbicides. Solid mp = 30° bp = 417°, bp30 = 211°, bp2 = 148° d20 = 0,8520, d n 0.8247 insoluble in H2O, soluble in Et20, very soluble in EtOH, Me2CO, CeHs, CHCI3. Fina Chemicals Henkel/Emery Penta Mfg. Stepan. 

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