Cis-3-nonenal

R-CO-CI - R-CO-F) l-Nonene l-Fluoro-3-hydroxy-EIOb2, 325 (l-F l-H) 3-Nonene l-Fluoro-2-hydroxy-E10b2, 40 (Educt)... 

C9H18 1-methyl-cis-2-propylcyclopentane 932-43-4 169.15 14,072 2 17944 C9H18 trans-3-nonene 20063-92-7 183.97 16.382 2... 

Irradiation of the lipid (fet soluble) phase of a meat extract does not produce the characteristic off-odor while irradiation of the aqueous (water soluble) portion of die meat extract results in a typical irradiation odor (20). 3) Irradiation of sulfur-containing amino acids or polypeptides produced a similar off-odor as the irradiation odor (21). 4) The amount of VSCs increased with radiation dose while volatiles from lipids were not always correlated with radiation dose (19). Several earlier researchers suggested that hydrogen sulfide (H2S) and methanethiol (MT) were important for the development of the off-odor (12, 20, 22). Patterson and Stevenson (23), using GC-olfactory analysis, showed that dimethyl trisulfide (DMTS) was the most potent off-odor compound in irradiated raw chicken meats followed by cis-3- and trans-6-nonenals, oct-l-en-3-one and bis(methylthio-)methane. Aim and his colleagues have published extensively on irradiation-induced volatile compounds in raw meats (11). They have identified MT, dimethyl sulfide (DMS), dimethyl disulfide (DMDS) and DMTS in different types of irradiated raw meats using GC-FID and GC-MS. 

Nonanal 1,3-Nonanediol acetate, mixed esters Nonanoic acid 2-Nonanol 2-Nonanone 3-Nonanon-1-yl acetate trans-2-Nonenal cis-6-Nonen-1-ol trans-2-Nonen-1-ol n-Nonyl acetate... 

Ferric sodium pyrophosphate (anhyd.) 35764-59-1 Cismethrin 35852-46-1 Hexenyl-cis-3-valerate 35854-86-5 cis-6-Nonen-1-ol 35884-42-5... 

As shown in Fig. 3, the initial products from the 9- and 13-hydroperoxides of linoleic acid are the volatile aldehydes c/j-3-nonenal and hexanal and the corresponding C9 and C12 0x0 acid fragments. Analagous volatile products from linolenic acid are cw-3,c/s-6-nonadienal and cw-3-hexenal. However, in most plants, an isomerase enzyme converts the cis-3-enals to the trans-2 isomers (see Fig. 3). Such an enzyme cis-Z, trans-l-emA isomerase has been partially purified from cucumber fruits (Phillips et al., 1979). 

A soln. of 9,9-dibromobicyclo[6.L0]nonane in anhydrous ether added dropwise with stirring and heating to Mg-turnings and ether in a flask equipped with an over-size Dry Ice condenser, after abatement of the rapid reaction stirred under reflux for an additional 3 hrs. 1,2-cyclononadiene (Y 59%) in anhydrous ether added to a soln. of Na in liq. NHg, stirred and refluxed 1 hr. cis-cyclo-nonene (Y 85%). Also reduction with Pd-on-charcoal s. P. D. Gardner and M. Narayana, J. Org. Chem. 26, 3518 (1961). 

Cucumber, pear 9(S)-hydroperoxy-10-trans, 12-cis-octadecadienoic acid (9-LOOH) (Z)-3-nonenal + 9-oxo-nonanoicadd... 

The reaction of 5-aza-2,7-nonadienyl-l-carbonate 29 gives 3,4-diethenylpyrrolidine 30 ivith reasonable cis-selectivity (Eq. 5), whereas l-(trans-4-acetoxycyclohexenyl)allylmalo-nate 31 affords ds-fused exo-methylenebicyclo[4.3.0]nonene 32 exclusively (Eq. 6). 

The reaction course strongly depends on the solvent employed. In fact, when (Z)-6-nonen-2-ol (1) is cyclized in dimethyl sulfoxide, no migration of the double bond occurs and tetrahydro-2-methyl-b-ffis)- -propenyl]-2//-pyran (2) is obtained in quantitative yield. The cyclization proceeds with high 1,3-asymmetric induction and the major product has the 2,6-cis relationship. The larger substituents preferentially occupy the equatorial position, due to thermodynamic control of the reaction and equilibration of the chair conformers81. 

Acyclic and cyclic allenes are converted to alkenes at 60 °C under atmospheric pressure of hydrogen with [RhCl(PPh3)3]. 1,2-Nonadiene (26), 3-ethyl-1,2-pentadiene and 1,2-cyclotridecadiene are hydrogenated to give cts-2-nonene (27), 3-ethyl-2-pentene and cyclotridecene (cis trans = 85 15), respective-... 

C9H17Br trans-1 -bromo-1 -nonene 53434-75-6 478.15 43.797 1,2 17888 IC9H18 1,cis-2-dimethyl-trans-4-ethylcyclopentane 62016-65-3 420.15 35.488 1,2... 

C9H17F cis-1 -fluoro-1 -nonene 66688-74-2 408.75" 36.067 2 17898 C9H18 1,trans-3-dimethyl-trans-4-ethylcyclopentane. .. 418.15 35.311 1,2... 

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