2-Methoxy cinnamaldehyde

Evaluation for chemical constituents in open-pollinated seedling progenies of C. cassia accessions from Calicut (India) showed that these contained 1.20. 95% bark oil, 6.0-10.5% bark oleoresin and 0.40-1.65% leaf oil. The principal component of both the oils, namely, cinnamaldehyde, varied from 40.7-86.0 and61.9-91.5%, respectively, in leaf and bark oils (Krishnamoorthy et al., 1999). The bark oil of C. cassia from the Yunnan province was dominated by cinnamaldehyde (80.40-88.50%) (Li et al., 1998). The bark oil from China recorded 65.5% E-cinnamalde-hyde, 8.7% coumarin, 3.6% cinnamyl acetate and 2.7% 2-methoxy cinnamaldehyde as chief components, whereas in the Australian oil, cinnamaldehyde (87%), benzaldehyde (4.7%), 2-phenyl ethanol (2.5%) and 3-phenyl pro-panal (2%) predominated (Vernin et al., 1990). Li and Yuan (1999) reported cassia oil from China containing 67.12% E-cinnamaldohydo, 6.17% methyl salicylate, E-2-melhoxy cinnamaldehyde (7.40%) and -cinnamyl acetate (3.47%) as major components. 

The chief constituents of leaf oil of cinnamon cassia from Yunnan province were cinnamaldehyde (64.1-68.3%), ( )-2-methoxy cinnamaldehyde (8.4-10.5%) and ( )-cinnamyl acetate (4.5-12.5%) (Li etal., 1998). The structures of the chief volatile components of cinnamon oil are shown in Fig. 7.1. 

Pinene 2-8% pinene 1-4% myrcene 1-12% of-pheUandrene 1-25% Hmonene 8 30% fenchone 7-16% estragole 2-7% cw-anethole <0.5% rra/ii-anethole 15-40% anise ketone <0.05% tasmanian-type a -pinene 2-11% a-pheUandrene 1-8.5% hmonene 1 % fenchone 10-25% estragole 1.5-6% cis-anethole <0.5% trans-anethole 45-78% anisaldehyde <1% anisketone <0.05% /S-myrcene 0.1-1% hmonene 30-45% trans-dihydrocarvone max. 2.5% carvone 50-65% trans-casrveoh max. 2.5% trans-cinnamic aldehyde 70-90% cinnamyl acetate 1-6% eugenol <0.5% coumarin 1.5-4% rra s-2-methoxy-cinnamaldehyde 3-15%... 

ISO standard 3216 shows character and data for the Chinese type oil. Main component is trans-cinnamaldehyde. Synthetic cinnamaldehyde as well as coumarin is used for adulteration. This oil is often used for the adulteration of cinnamon bark oil. That is easy to detect, as coumarin is not a component of that oil. If o-methoxy cinnamaldehyde is found in cinnamon bark oil, it is a sign for adulteration with cassia oil. The naturality of the cinnamaldehyde can be detected by the combination of GC-combustion IRMS (GC-CTRMS) and GC-P-IRMS. 

L.CO2 1.4% [13] (steam 0.5-0.8 Cinnamaldehyde, t -methoxy cinnamaldehyde. Brown mobile refractive oil. 

A frequently reported spectrophotometric technique for the determination of hydralazine is based on reactions with aromatic aldehydes to form hydrazones with absorption in the visible region. Luk yanchikova et al (5 +) used p-nitrobenzaldehyde Wesley-Hadzija and Abaffy (55) and Ruggieri (56) used p-dimethylaminobenzaldehyde Luk yanchi-kova (57,58) used cinnamaldehyde Schulert (33) used p-hydroxybenzaldehyde and Zak et al (59) used p-methoxy-benzaldehyde, after testing cinnamaldehyde, salicylaldehyde, 3, +,5-trimethoxybenzaldehyde, and 1-naphthaldehyde. 

ChOLESTANE, 30-METHOXY-, 41, 9 Cholestanol, etherification of, 41, 9 Cholestanyl methyl ether, 41, 9 Cinnamaldehyde, reaction with Wittig reagent, 40,86... 

The a-P double bond in hydroxy- or methoxy-substituted stilbenes should also be stable to hydroperoxide ion. It is the electron withdrawing carbonyl group in cinnamaldehydes that makes their double bond susceptible to nucleophilic attack. 

The addition of MeLi, -BuLi, and PhLi to cinnamaldehyde i 7-(4-methoxy-phenyl)imine 2b was then studied in the presence of varying amounts (0.25,1.0, and 2.0 equiv per equiv of 2b) of catalyst 17. The reactions were run in Et20, at -60 °C for 3 h and then warmed to room temperature for 18 h (Scheme 11). The highest, but still moderate enantiomeric purities were obtained using MeLi as the nucleophile (up to 21% ee) and the secondary amines 3b were isolated in moderate yields, too up to 60% this trend is comparable with that previously observed for catalyst la [19a, 19b, 19c, 19d]. Most of the secondary amines 3b... 

Acetaldehyde 83>, chloral 84>, isovaleralde-hyde 83)f benzaldehyde 83,100,128,140) >-isopropylbenzaldehyde 1S°J, anisaldehyde 84,loo) 2,4-dimethoxybenzaldehyde 150>, sahcylaldehyde 84>, furfural 84>, p-chlorobenz-aldehyde 14 >, phthalaldehyde 10 ), isoph-thalaldehyde 10 >, terephthalaldehyde 106>, cinnamaldehyde 84>, 2-methoxy-l-naphth-aldehyde 150>, 2-formylquinoline 105>, 9-anthraldehyde 105>, 3-pyrenealdehyde 10 > p-tolualdehyde 172>, p-nitrobenzaldehyde l72>, m-nitrobenzaldehyde 172>, />-cyanobenzaldehyde 172>... 

Interest has been shown in the oxides of dicyclopentadiene, as noted earlier, with reports of epoxidations using permaleic, perphthalic, " and peracetic acids. The mechanism of oxidation of fran -stilbene by peroxomonophosphoric acid (H3PO5) in a number of solvents has been investigated. A report on the epoxidation of a number of methoxy- and hydroxy-substituted cinnamaldehydes (24 R = = H, MeO, or OH) concludes with the suggestion that the... 

A soln. of l-trimethylsiloxy-l,3-butadiene in tetrahydrofuran added at -78° under argon to a mixture of cinnamaldehyde dimethyl acetal and TiCl4 in dry tetrahydrofuran, and stirred an additional 4 hrs. -> 7-phenyl-5-methoxy-2,6-hepta-dienal. Y 88%. F. e., also in the presence of Ti-alkoxides and with interdiange of the second alkoxy group of the acetal, s. T. Mukaiyama and A. Ishida, Chem. Lett. 1975, 319, 1201. 

Cassia oil Cinnamomum cassia Bark SD Cinnamaldehyde, 2-methoxy... 

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