Methanolysis of 2,4,6-tri-O-benzoyl-2,3-dibromo-3-deoxy-D-altrono-1,5-lactone gave methyl 3-bromo-3-deoxy-2,4,6-tri-O-benzoyl-alpha-D-ribo-hex-2-ulofuranosonat e (3) and the anomeric mixture of the analogous 4,6-di-O-benzoyl derivative, having HO-2 free. Compound 3 was subjected to debromination with tributyltin hydride and tributyltin deuteride in the presence of 2,2'-azo-bisisobutyronitrile a...

The two title compounds, C28H26N2O2, (I), and C27H22BrClN2O2, (II), differ in their substituents, viz.4-methyl-phenyl and benzoyl rings in (I) replaced by 2-chloro-phenyl and 4- bromo-benzoyl, respectively, in (II). A significant difference between the two mol-ecules is found in the deviation of the benzoyl O atom from the least-squares plane of the ring to which it is attached [0.593 (4) and 0...

In order to study the effect of halogen bond on tautomerism in β-diketones solid-state, we have prepared a series cocrystals derived from an asymmetric β-diketone, benzoyl-4-pyridoylmethane (b4pm), as acceptor and perfluorinated iodobenzenes: iodopentaflourobenzene (ipfb), 1,2-, 1,3- 1,4-diiodotetraflorobenzene (12tfib, 13tfib 14tfib) 1,3,5-triiodo-2,4,6-trifluorobenzene (135titfb). All five ar...

C14H10O2Se2 is monoclinic, P2(1)/c. The unit-cell dimensions at 293 K are a = 12.795(2), b = 12.126(2), c = 9.0179(13)A, beta = 107.074(6)degrees, V = 1337.5(3)A3, and Z = 4. The R value is 0.048 for 2319 observed reflections. The dihedral angle between the plane C4-C7(O2)-Se1 and C9-C8(O1)-Se2 is 85.6(2)degrees, keeping the Se atom unshared electron pairs in a more stable configuration with th...

In the structure of the title compound, C(14)H(12)ClNO, the N-H and C=O bonds are trans to each other. Furthermore, the C=O bond is syn to the ortho-methyl group in the benzoyl ring, similar to what is observed in 2-methyl-N-(4-methyl-phen-yl)benzamide and 2-methyl-N-phenyl-benzamide. The amide linkage (-NHCO-) makes dihedral angles of 36.9 (7) and 46.4 (5)° with the aniline and benzoyl rings, ...

Oxidation of different types of 1,4-dihydropyridines with diphenylpicrylhydrazyl (DPP) and benzoyl peroxide (Bz2O2) as free radical oxidizing agents to pyridine derivatives is reported and a mechanism for this oxidation is also proposed.

Cigarette smoking is the major cause of lung cancer in humans. The continuous increase in the prevalence of cigarette smoking worldwide demands a practical means to circumvent this serious health problem. Our research has focused on the development of new chemopreventive agents against lung carcinogenicity of the tobacco-specific nitrosamine 4(methylnitrosamino)-l-(3-pyridyl)-l-butanone. Severa...

In many species benzoate is conjugated in the liver with glycine to form hippurate, after prior formation of benzoyl-CoA, which then reacts with glycine in a transacylation catalysed by glycine N-acylase (EC 2.3.1.13) (Bridges et al., 1970). This enzyme has been prepared from mitochondria (Schachter & Taggart, 1954; Bartlett & Gompertz, 1974), although there is no information about its submitoc...

1. There is no effective anti-H5N1 avian influenza agent. 2. A chemical compound— BFDBSC—can inhibit H5N1 virus infection in cell cultures, and such inhibition might be attributable to its halogenated benzoyl residues. 3. This pilot study assessed anti- H5N1 activity and toxicity of four chemical compounds with halogenated benzoyl residues in cell culture system. 4. Two compounds—FPBFDBSC and B...