P-Methoxycinnamic acids

Camauba wax is obtained from the leaves of several species of palm trees in South America, such as Copemicia cerifem which grows in Brazil. It is made up of esters of long chain alcohols and acids with high carbon number, high molecular weight polyesters of hydroxyacids, and derivatives of p-hydroxy- and p-methoxycinnamic acid [84]. 

Mercury benzamide, 797 Mercury-sealed stirrers, 66-69, 220 Mesitaldehyde, 690, 701 Mesityl oxide, 353 Metaldehyde, 319 Metanilic acid, 586, 589 Methiodides, 660 Metho-p-toluenesulphonates, 660 p-Methoxyacetophenone, 733 p-Methoxybenzaldehyde, 690, 703 4-Methoxybenzoin, 708, 714 p-Methoxycinnamic acid, 719 p-Methoxyphenylacetic acid, 904, 905, 924, 925... 

To activated montmorillonite K-10 clay (2 g) in a 100-mL Erlenmeyer flask was added a mixture of freshly distilled phenol (0.50 g, 5.3 mmol) and recrystallized p-methoxycinnamic acid (0.94 g, 5.3 mmol) dissolved in CH2CI2 (5 mL) along with one drop of concentrated H2SO4. The solvent was evaporated and the resultant free-flowing solid placed on a silica bath and subjected to microwave irradiation at 640 W for 10 min. Dichloromethane (20 mL) was added, the reaction mixture filtered and the filtrate washed with saturated NaHC03 solution, brine and dried over Na2S04. Evaporation of the solvent in vacuo yielded the product, 1.05 g (82%). 

C10H10O3 p-methoxycinnamic acid, predominantly trans 830-09-1 44.33 1.1531 2 19327 C10H11NO3 ethyl oxo(phenylamino)acetate 1457-85-8 25.00 1.199 2... 

Isomerisation - The influence of aryl substituents upon the photoisomerism of methyl-a-phenylcinnamates has been studied," and reversible tran5,c/j-isomerism of p-methoxycinnamic acid is reported to occur on irradiation in polar solvents. Irradiation of the cinnamides (100) in methanol induces efficient ra 5, m-isomerism. ... 

L-Tyrosine reacted with dimethyl sulfate in NaOH, first at room temp., finally with heating on a water bath —p-methoxycinnamic acid. Y 88.9%.—N-Methyltyrosine and tyrosine betaine can be obtained with a smaller amount of dimethyl sulfate. (U. A. Corti, Helv. 32, 681 (1949).)... 

Cinoxate. 3-(4-Methoxyphenyl)-2-propenoic acid Z-Cthoxyethyl ester p-methoxycinnamic acid 2-ethoxyethyl ester 2-ethoxyethyl p-methoxycinnamate Give-Tan Sun-Dare. C H.,0, moi wt 250.28. C 67.18%, H 7,25%, O 25.57%. Prepn Brit, pat, 856,411 (I960 to Givaudan). 

In five nematic liquids investigated, the domain structure is similar to that shown in Figure 1. This structure persists indefinitely as long as the field is applied. The behavior of nematic p-methoxycinnamic acid (3) is different and illustrates some interesting features of the interface or wall between domains. 

Figure 4 and after about 12 seconds to that in Figure 5. Ultimately the pattern disappears entirely, even though the field remains on. This appears to be the action of an interfacial tension contracting the domain walls to minimize their length. The optical properties indicate that the nematic axis in p-methoxycinnamic acid is parallel to the glass. There is some...

Optical examination of the effects of applied electric fields provides a sensitive technique for investigating the structure of nematic liquids. Two distinct kinds of interfaces exist in pure nematic liquids. One corresponds to the crystallite boundaries in ordinary polycrystalline solids. The other is the interface between domains which shows effects of interfacial tension in p-methoxycinnamic acid. In other nematic liquids this effect is not found. 

The principle of exciton coupling between vicinal benzoate chromophores has been extended to other aromatic carboxylic acid derivatives , including those of ring-substituted benzoic acids, 9-anthranoic acid (141) and p-methoxycinnamic acid (142). These derivatives have been widely used for the determination of the absolute stereochemistry in polyol natural products. The circular dichroism of the A -p-bromobenzoyl group combined with various 0-, 0,0 -di- and 0,0, 0"-tii-(p-bromobenzoyl) derivatives of 2-amino-2-deoxygalactopyranoside and an iV-anthranoyl group combined with tri-, tetra- and penta-p-methoxycinnamoyl derivatives of acyclic 1-amino polyols were studied to improve and develop microscale CD methods for the structural study of amino sugars. 

CAS 104-28-9 EINECS/ELINCS 203-191-0 Synonyms Cinnamic acid, p-methoxy-, 2-ethoxyethyl ester 2-Ethoxyethyl p-methoxycinnamate p-Methoxycinnamic acid 2-ethoxyethyl ester 3-(4-Methoxyphenyl)-2-propenoic acid 2-ethoxyethyl ester Phiasol 2-Propenoic acid, 3-(4-methoxyphenyl)-, 2-ethoxyethyl ester Propenoic acid, 3-(4-methoxyphenyl)-, 2-ethoxyethyl ester Classification Aromatic ether Empirical C14H18O4... 

SO2CI2 added to a soln. of a-phenyl-tra/iy-p-methoxycinnamic acid in SOClg, refluxed 0.5 hr., excess SOCI2 removed by distillation, then heated slowly until a vigorous reaction starts at 140-160°, finally a temp, of 200° maintained for 5 min. 3,12-dimethoxyphenylcinnamalone. Y 50%. F. e. s. A. L. Bednowitz et al., J. Org. Chem. 39, 3537 (1974). 

Posner, J. prakt. Chem., 1910, 82, 430. p-Methoxycinnamic Acid p-Coumaric acid mkhyl ether). 

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