Regioselectively, ethyl propiolate reacted with 1-(propergyl)-pyridinium-3-olate to give two regioisomers; ethyl 4-oxo-8-(prop-2-ynyl)-8-aza-bicyclo(3.2.1)octa-2,6-diene-6-carboxylate 4, ethyl 2-oxo-8-(prop-2-ynyl)-8-aza-bicyclo(3.2.1)octa-3,6-diene-6-carboxylate 5 as well as ethyl 2,6-dihydro-6-(prop-2-ynyl)furo(2,3-c)pyridine-3-carboxylate 6. The obtained compounds were identified by their sp...

In the mol-ecule of the title compound, [Co(C(6)H(4)NO(2))(2)(H(2)O)(2)], the coordination environment around the Co(II) atom is distorted octahedral; two N and two O atoms of the pyridine-2-carboxylate ligands lie in the equatorial plane and the two water O atoms in the axial positions. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules, forming a supra-moleular...

The synthesis of the title compounds was achieved using ethyl 2-amino-6-methyl-4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxylate (1) as starting material. The reaction of the amino ester 1 with phenylisothiocyanate in boiling ethanol afforded the thiourea derivative 5. The cyclization reactions of 5 under different reaction conditions led to different pyridothienopyrimidine derivatives. Oth...

Abstract In 90 Sr analysis, determining its daughter Y improves the sensitivity of radiometric methods. We found that to imprint a cavity made [Y(6-(4-Vinylphenylcarbamoyl)pyridine-2-carboxylate) 3 ] into polystyrene skeleton yields solid phase extraction resin with high selectivity for and Ln(III) over transition metals, alkaline, alkaline-earth cations. used this in an automated chromatograph...

Abstract The low stability of the electrocatalysts at water oxidation (WO) conditions and use expensive noble metals have obstructed large‐scale H 2 production from water. Herein, we report electrocatalytic WO activity a cobalt‐containing, water‐soluble molecular electrocatalyst [Co II (mcbp)(OH )] ( 1 ) [mcbp 2− =2,6‐bis(1‐methyl‐4‐(carboxylate)benzimidazol‐2‐yl)pyridine] in homogeneous (overp...