2.4- Dimethoxy-6- -benzoic acid

Benzoic acid, 2-benzoyl-, methyl ester [606-28-0,21204-864], 63 Benzoic acid, 4-bromo- [586-76-5], 86 Benzoic acid, 4-chloro- [74-11-3], 86 Benzoic acid, 2-[(diethylamino)carbonyl]-, methyl ester [2659344-2], 63 Benzoic acid, 2,4-dimethoxy- [91-52-1 ], 31 Benzoic acid, 3,4-dimethoxy- [93-07-2], 31 Benzoic acid, 3,4-dimethyl- [619-04-5], 31 Benzoic acid, 3,5-dimethyl- [499-06-9], 86 Benzoic acid, 4-hydroxy- [99-96-7], 60 Benzoic acid, 3-methyl- [99-04-7], 86 Benzoic acid, 4-methyl- [99-94-5], 86 Benzoic acid, 2,4,6-tnmethyl- [480-63-7],... 

Ricinelaidic acid 9-Octadecenoic acid, 12-hydroxy-, [/ -( )]- Veratric acid Benzoic acid, 3,4-dimethoxy-... 

All cements that contain eugenol inhibit the polymerization of acrylates, and those of EBA-eugenol are no exception. In order to remedy this and other defects, Brauer and his coworkers examined alternatives to eugenol (Figure 9.7). These included the esters of vanillic acid (3-methoxy-4-hydroxybenzoic acid, HV) and syringic acid (3,5-dimethoxy-4-hydroxy-benzoic acid). Both are 3-methoxy-4-hydroxy compounds and are thus chemically related to eugenol and guaiacol. Both are solids and have to be dissolved in EBA where they form satisfactory cements with EBA zinc oxide powder. The vanillate (EBA-HV) cements are the more important. 

Figure 12.12 THM GC/MS curves of a Winsor Newton lemon alkyd paint (a) and of an alkyd sample taken from Fontana s work Concetto spaziale (1961) (b). Peak assignments 1, 1,3 dimethoxy 2 propanol 2, 1,2,3 trimethoxy propane 3, 3 methoxy 1,2 propandiol 4, 4 chloro benzenamine 5, 3 methoxy 2,2 bis(methoxymethyl) 1 propanol 6, 3 chloro N methyl benzenamine 7, 3 methoxy 2 methoxymethyl 1 propanol 8, 4 chloro N methyl benzenamine 9, phthalic anhydride 10, 3 chloro 4 methoxy benzenamine 11, suberic acid dimethyl ester 12, dimethyl phthalate 13, azelaic acid dimethyl ester 14, sebacic acid dimethyl ester 15, palmitic acid methyl ester 16, oleic acid methyl ester 17, stearic acid methyl ester 18, 12 hydroxy stearic acid methyl ester 19, 12 methoxy stearic acid methyl ester 20, styrene 21, 2 (2 methoxyethoxy) ethanol 22, 1,1 oxybis(2 methoxy ethane) 23, benzoic acid methyl ester 24, adipic acid dimethyl ester 25, hexadecenoic acid methyl ester 26, dihydroisopimaric acid methyl ester 27, dehydroabietic acid methyl ester 28, 4 epidehydroabietol...

Convert benzoic acid to 3,5-dihydroxybenzoic acid (alpha-resorcyclic acid) (I). 50 g (I), 134 g dimethylsulfate, 60 g NaOH, 300 ml water add 35 g NaOH and reflux to obtain about 50 g 3,5-dimethoxybenzoic acid (II) which is converted to dimethoxybenzoyl chloride (HI) with PCI5. Extract the (HI) with ether and filter. Saturate the ether with NH3 at 0° C and filter. Wash with ether and water and reciystallize from hot water to get 3,5-dimethoxy-benzamide (IV). To a solution of 1 M of n-hexyl bromide (or 1,2-dimethylheptyl bromide, etc.) add 24.3 g Mg in 200 ml ether to... 

Mono(2,6-dimethoxybenzoyl)tartaric acid Butanedioic acid, 2-[(2,6-dimethoxybenzoyl)oxy-3-hydroxy-, [R-(R, R )]- (12) (116212-44-3) 2,6-Dimethoxybenzoic acid Benzoic acid, 2,6-dimethoxy- (8,9) (1466-76-8) Trifluoroadetic anhydride Acetic acid, tritluoro-, anhydride (8,9) (407-25-0) Borane-Tetrahydrofuran Furan, tetrahydro-, compd. with borane (1 1) (8,9) (14044-65-6)... 

The >, > -dimer of 6-methylguaiacol (3,3 -dimethoxy-4,4 -dihydroxy-5,5 -dimethylbiphenyl-l,l ) exhibits the lowest C.O.P., and we found that this compound is even oxidized when exposed to the atmosphere (decrease of 80 mv.). The benzoic acid derivative (V), on the other hand, had the highest C.O.P. (caused by the electron attracting —COOH group in the 0-position) indicating its stability towards oxidation. 

The enamide 73 was prepared from 2,3-dimethoxy-5,6-methylenedioxy-benzoic acid and 6,7-methylenedioxy-l-tetralone, and was then irradiated to afford the lactam 74 in 38% yield. On acid treatment 74 was converted to the dehydrolactam 75 as a result of the elimination of the migrated meth-oxyl group. Dehydrogenation with 30% Pd/C, reduction with vitride, followed by treatment with DDQ, completed total synthesis of chelirubine (76) 91,92) (Scheme 43). 

The synthesis of A -Ddz-protected amino acids is generally achieved with the 2-(3,5-di-methoxyphenyl)prop-2-yl azidoformate (Ddz-Nj) which is obtained from 3,5-dimethoxy-benzoic acid by a multistep procedure. ] Protection is performed either under Schotten— Baumann conditions, or preferentially, by acylation of the amino acid benzyltrimethylam-monium salts in pyridine.b l N -Acylation of the amino acid methyl esters followed by saponification has been reported to produce the desired derivatives in higher overall yields. 

C16H1403 4-methyl benzoic acid anhydride 13222-85-0 561.15 49.789 2 29297 C16H1603 2,2-dimethoxy-2-phenyl acetophenone 24650-42-8 568.48 50.501 2... 

In some situations, the pH of the buffer can be very critical. An example of such a critical pair of components is given in Fig. 1 a mixture of benzoic and 2,3-dimethoxy benzoic acid, analyzed around pH 4.67. A... 

Hofmann degradation of the crystalline mesembrine methiodide afforded a definite desmethylmesembrine but further degradation failed (11). Alkali fusion, degradation by ozone, and selenium dehydrogenation (6) were also without success. Oxidation with potassium permanganate produced 3,4-dimethoxyphenylglyoxylic acid and 3,4-dimethoxy-benzoic acid (7). 

Proof of the structure [xi] was sought and found by the oxidation of phenyldihydrothebaine with alkaline potassium permanganate, which resulted in the production of benzaldehyde, benzoic acid, and 4-methoxyphthalic acid. By exhaustive methylation of the methyl ether the optically active (+)-3 4-dimethoxy-2-(5-methoxy-2-vinylphenyl) stilbene [xn] (prepared by Freund [1], but stated to be optically inactive) was obtained, and permanganate oxidation of this afforded 5 6 5 -trimethoxydiphenaldehyde [xm] (also obtained by the ozonoly-sis of [xn]) and 5 6 5 -trimethoxydiphenic acid [xrv] (also obtained by oxidation of [xm]). This acid was identified with an authentic specimen prepared in stages from 4-acetoxy-3 6-dimethoxyphenanthrene quinone (acetylthebaolquinone [xv]) [6-7, 9-10],... 

N-Oxidation of 3,3 -bipyridazines is influenced by substituents in a similar way to that for pyridazines. Thus, the nitrogen atoms adjacent to an aryl or methoxy substituent are not oxidized. Thus, the 6,6 -dimethyl compoimd (124) gives with hydrogen peroxide the l,l -dioxide (125), and with peroxy-benzoic acid a mbcture of the monoxide (126) and a small amount of the dioxide (125). No isomeric 2-oxides were formed. Similar results were obtained with 3,3 -bipyridazine itself. On the other hand, the 6,6 -dimethoxy analog (127) affords the 2,2 -dioxide (128) with hydrogen peroxide, and. a... 

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