An alternative and practical synthesis of (S)-1-(2-chloroacetyl)pyrrolidine-2-carbonitrile was achieved. Reaction of L-proline with chloroacetyl chloride was followed by conversion of the carboxylic acid moiety of the resulting N-acylated product into the carbonitrile via the corresponding amide intermediate. The synthesized pyrrolidine derivative was utilized to prepare DPP-IV inhibitor Vildag...

The condensation of substituted pyrazine-2-carboxylic acid chlorides with ring-substituted anilines yielded five substituted pyrazine-2-carboxylic acid amides. Thesynthesis, and analytical, lipophilicity and biological data of the newly synthesizedcompounds are presented in this paper. The photosynthesis inhibition, antialgal activityand the effect of a series of pyrazine derivatives as abiotic...

173.345 Chloropentafluoroethane. 173.350 Combustion product gas. 173.355 Dichlorodifluoromethane. 173.356 Hydrogen peroxide. 173.357 Materials used as fixing agents in the immobilization of enzyme preparations. 173.360 Octafluorocyclobutane. 173.368 Ozone. 173.370 Peroxyacids. 173.375 Cetylpyridinium chloride. 173.385 Sodium methyl sulfate. 173.395 Trifluoromethane sulfonic acid. 173.400 Dimeth...

substituted schiff bases (hydrazones) 5a-j have been prepared from the starting material 2-chloro pyridine-3-carboxylic acid 1 by a sequence of reactions like reaction with 2-amino-6-nitro benzothiazole (ullamann condensation), thionyl chloride, hydrazine hydrate and different aromatic aldehydes. on cyclocondensation of 5a-j with thioglycolic acid in dry 1,4-dioxane furnished desired compounds ...

Condensation of the corresponding chlorides of some substituted pyrazine-2-carboxylic acids (pyrazine-2-carboxylic acid, 6-chloropyrazine-2-carboxylic acid, 5-tert-butylpyrazine-2-carboxylic acid or 5-tert-butyl-6-chloropyrazine-2-carboxylic acid) with various ring-substituted aminothiazoles or anilines yielded a series of amides. The syntheses, analytical and spectroscopic data of thirty newly...

In the dimeric title compound, [Zn(2)(C(14)H(9)O(4))(4)(C(10)H(8)N(2))(2)], the Zn(II) ions are penta-coordinated by one 2,2'-bipyridyl ligand and by three O atoms from three 2'-carboxyl-atobiphenyl-2-carboxylic acid ligands. Two of the 2'-carboxyl-atobiphenyl-2-carboxylic acid ligands act as bridging ligands and, together with two zinc(II) cations, produce an 18-membered ring system. The remai...

The newly isolated strain Pseudomonas sp. ON-4a converts D,L-2-amino-delta2-thiazoline-4-carboxylic acid to L-cysteine via N-carbamoyl-L-cysteine. A genomic DNA fragment from this strain containing the gene(s) encoding enzymes that convert D,L-2-amino-delta2-thiazoline-4-carboxylic acid into L-cysteine was cloned in Escherichia coli. Transformants expressing cysteine-forming activity were selec...

A series of 3,4-dihydroisoquinoline-3-carboxylic acid derivatives were synthesised and tested for their free-radical scavenging activity using 2,2-diphenyl-1-picrylhydrazyl radical (DPPH·), 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical (ABTS·+), superoxide anion radical (O2·-) and nitric oxide radical (·NO) assays. We also studied d-amino acid oxidase (DAAO), acetylcholinestera...