Benzoic acid, 2- carbonyl methyl ester

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],... 

Benzoic acid, 4-bromo-[586-76-5], 56, 86 Benzoic acid, 4-chloro-[74-l 1-3], 56, 86 Benzoic acid, 2-[(diethylamino)carbonyl]-, methyl ester [26593-44-2], 56,63 Benzoic acid, 2,4-dimethoxy-[91-52-l],... 

CN rranj -2-[[[4-[[(aminoiminomethyl)amino]methyl]cyclohexyl]carbonyl]oxy]benzoic acid phenylmethyl ester... 

Another example, which shows an effective competition channel in the nucleophilic attack upon a carbonyl centre concerns the reactions of OH-and Ov with methyl formate. Using lsO-labelled reactant ions, a significant contribution of the SN2 mechanism (— 20% for OH- and 40% for Ot) in addition to the pathway via a tetrahedral structure has been found for formation of the formate anion as summarized in (20) and (21) (Dawson and Nibbering, 1978a Johlman and Wilkins, 1985 van der Wei and Nibbering, 1986). Similar observations have been made for other methyl esters, such as those of trifluoroacetic and benzoic acid (Takashima and Riveros, 1978). 

The o-substituted benzoic acid methyl ester of formula (CH3)2NC6H4C02CH3 has been found to lose both the ester methyl and the amine methyl in metastable ion decompositions. It has been proposed that the bond cleavage to eliminate the ester methyl is accompanied by a hydrogen transfer from one of the other methyl groups to the carbonyl oxygen in a 7-membered cyclic transition state [83]. The mechanistic proposal rests upon isotope effects observed on substituting deuterium in methyl groups. 

CoMFA and related 3D QSAR approaches have been applied to correlate various physicochemical properties. Equilibrium constants of the hydration of carbonyl groups could be explained by a combination of C=0 bond order, steric, and electrostatic fields [1005]. 3D QSAR studies that correlate a, inductive, and resonance parameters of benzoic acids [1015, 1016] as well as pKg values ofclonidine analogs [1017] show that a H " field precisely describes such electronic parameters, e.g. (Jm.p of benzoic acids (n = 49 rpir = 0.976 snr = 0.082 Spress = 0.093). Steric parameters of benzoic acids, like surface area and van der Waals volume can be described by a steric field alone, while values of acetic acid methyl esters need a combination of both steric and electrostatic fields (n = 21 rpix = 0.984 Sfit = 0.133 SpREss = 0.209) [1016]. 

Polyester fibers are composed of linear chains of polyethylene terephthalate (PET), which produces benzene, benzoic acid, biphenyl, and vinyl terephthalate on pyrolysis. Acrylic fibers comprise chains made up of acrylonitrile units, usually copolymerized with less than 15% by weight of other monomers, e.g., methyl acrylate, methyl methacrylate, or vinylpyrrolidone. Thermolysis results in the formation of acrylonitrile monomer, dimers, and trimers with a small amount of the copolymer or its pyrolysis product. In this case, the acrylic is Orion 28, which contains methyl vinyl pyridine as comonomer. Residual dimethyl formamide solvent from the manufacturing process is also found in the pyrolysis products. Cotton, which is almost pure cellulose, comprises chains of glucose units. The pyrolysis products of cellulose, identified by GC/MS, include carbonyl compounds, acids, methyl esters, furans, pyrans, anhydrosugars, and hydrocarbons. The major pyrolysis products are levoglucosan (1,6-anhydro-B-D-glucopyranose) and substituted furans. 

Benzoic acid, 2-((3-[[(2,3-dihydro-2-oxo-l H-benziinidazol-5-yl)amino)-carbonyl]-2-hydroxy-l-naph-thalenyl]azo)-, methyl ester /... 

Other Names 2-(6-Amino-3-imino-3//-xanthen-9-yl) benzoic acid methyl ester Benzoic acid, 2-(6-amino-3-imino-3//-xanthen-9-yl), methyl ester, monohydrochloride 3,6-Diamino-9-[2-(methoxycarbonyl)phenyl]xanthy-lium chloride Xanthylium, 3,6-diamino-9-[2-(methoxy-carbonyl)phenyl]-, chloride R 22420 R 302 RH 123 Rhodamine 123... 

In view of these results it is not surprising that even more sterically hindered carbonyl derivatives of Rf are also not accessible (22), An attempted synthesis of (Rf)2C0 from RpLi and dimethyl carbonate gave the methyl ester of 2,4,6-tris(trifluoromethyl)benzoic acid instead (25% yield). Similarly, treatment of RpLi with oxalyl dichloride did not yield the desired benzil derivative. In this reaction a 45% yield of 2,4,6-tris(trifluoromethyl ) -2-oxoethanoic acid, RfC(0)C00H, was obtained (22), All these experiments clearly demonstrate that in organic Rf chemistry steric hindrance is an important factor guiding the reactivity of various substrates. 

---