In the title compound, C(19)H(15)O(2)P, the dihedral angles between the benzoic acid ring and the phenyl rings are 75.64 (7) and 80.88 (7)°; the dihedral angle between the phenyl rings is 81.35 (7)°. In the crystal, inversion dimers linked by pairs of O-H⋯O hydrogen bonds generate R(2) (2)(8) loops between the head-to-head carb-oxy-lic acid groups.

Shikimic acid and its role in the formation of aromatic amino acids, benzoic acids, and cinnamic acids is described, along with further modifications leading to lignans and lignin, phenylpropenes, and coumarins. Combinations of the shikimate pathway and the acetate pathway are responsible for the biosynthesis of styrylpyrones, flavonoids and stilbenes, flavonolignans, and isoflavonoids. Terpeno...

The 2,4- and 2,5-dihydroxybenzamides (8, 9) were synthesized from their corresponding methyl esters. The structures and the spectral properties of investigated salicylic acid (1), 2,4- and 2,5-dihydroxy benzoic acids (2, 3), their methyl esters (4-6) and amides (7-9) were analyzed by means of FT-IR and one- and two-dimensional homo- and heteronuclear 1H and 13C NMR spectroscopies. Comparison of...

In milk and milk products, a number of organic acids naturally occur. We investigated the contents of some naturally occurred food preservatives (sorbic acid, benzoic acid, propionic acid, nitrite, and nitrate) contained in domestic and imported cheeses to establish the standard for the allowable range of food preservatives content in cheese. 8 kinds of domestic precheeses (n=104), 16 kinds of ...

In the title compound, C(11)H(11)NO(3), the dihedral angle between the benzene ring and the cyclo-propane ring is 63.2 (1)°. In the crystal, mol-ecules are linked through classical cyclic carb-oxy-lic acid O-H⋯O hydrogen-bond inter-actions [graph set R(2) (2)(8)] giving centrosymmetric dimers which are extended along the b-axis direction through amide N-H⋯O hydrogen-bond inter-actions, giving o...

The title compound, C(10)H(10)O(4), crystallizes with the well-known carb-oxy-lic acid dimer-forming R(2) (2)(8) hydrogen-bond motif. Chains approximately parallel to (-1-12) are then built through C(methyl-ene,phen-yl)-H⋯O(carbon-yl) inter-actions [C(6) and C(8) motifs] with one (meth-yl)C-H⋯π inter-action providing inter-planar binding. The weakness of the latter inter-action is consistent wi...

In the title compound, C(6)H(6)N(4)·2C(7)H(6)O(2), the asymmetric unit contains a half-mol-ecule of biimidazole and one benzoic acid mol-ecule. The unit cell contains two biimidazole mol-ecules and four benzoic acid mol-ecules, giving the reported 2:1 ratio of benzoic acid to biimidazole. The biimidazole mol-ecule is located on an inversion center (passing through the central C-C bond). Strong ...

An application of solid-phase extraction (SPE) for high-performance liquid chromatography (HPLC) analysis was developed for the rapid determination of benzoic acid and sorbic acid in Thai rice wine and distillate products. The SPE extraction gave promising results with 95.7+1.7% recovery for benzoic acid standard, and 95.2+2.3% for sorbic acid standard. Mean relative standard deviation (RSD) fo...

HE conversion of 2-amino-4-hydroxypteridine into isoxanthopterin in wildtype Drosophila melanogaster has been demonstrated and investigated by several groups (FORREST, GLASSMAN and MITCHELL 1956; HADORN and SCHWINCK 1956; NAWA, TAIRA and SAKAGUCHI 1958). This reaction is catalyzed by an enzyme which will also catalyze the oxidation of hypoxanthine through xanthine into uric acid, xanthopterin i...