We describe here a convenient and mild procedure for double carbonylation of o-dibromobenzenes with various 2-amino pyridines and naturally occurring amines, thus providing in good to excellent yields N-substituted phthalimides by using this palladium-catalyzed carbonylation procedure. Furthermore, for the first time we have applied the developed synthetic protocol for the synthesis of biologic...

Arylidenemalononitriles, 2-Cyano-1,1 -diaminoethene, Arylhydrazones, s_y«-2-Pyridinealdoxime, Pyridines Reactions of arylidenemalononitriles la-d with 2-cyano-l,l-diaminoethene (5); arylhydra­ zones 14a,b and syn-2-pyridinealdoxime 15 afforded the title derivatives 3a-d; 16a,b and 17, respectively. Bipyridyl derivatives 11-13 were also synthesized. Unambiguous syntheses and/ or spectral analyse...

für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution 4.0 International License. Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschung in Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht: Creative Commons Namen...

A series of enantioenriched 4,5,6,7-tetrahydrofuro[2,3-b]pyridines were accessed by a cycloisomerization/cycloaddition strategy. Starting from ynamide derivatives and aldehydes, yields ranging 27 to 90% high levels stereoselectivity (de>95%, 93–99% ee) obtained through sequential relay catalysis. The concurrent use gold complex with diphenylprolinol silyl ether was applied combination diversely...

Abstract Ruthenium‐catalyzed C−H bond activation and tandem cyclization of 2‐arylimidazo[1,2‐ a ]pyridines with iodonium ylides proceed efficiently. For the first time, easily available inexpensive ruthenium complex were employed to synthesize pyrido[1,2‐ ]benzimidazole derivatives in good yields under simple easy‐to‐operate conditions. Several primary mechanism investigations synthetic applica...

Six organometallic complexes of the general formula [M(II)Cl(η(6)-p-cymene)(L)]Cl, where M = Ru (11a, 12a, 13a) or Os (11b, 12b, 13b) and L = 3-(1H-benzimidazol-2-yl)-1H-pyrazolo[3,4-b]pyridines (L1-L3) have been synthesized. The latter are known as potential cyclin-dependent kinase (Cdk) inhibitors. All compounds have been comprehensively characterized by elemental analysis, one- and two-dimen...

A series of 2-, 3- and 4-substituted pyridines was metabolised using the mutant soil bacterium Pseudomonas putida UV4 which contains a toluene dioxygenase (TDO) enzyme. The regioselectivity of the biotransformation in each case was determined by the position of the substituent. 4-Alkylpyridines were hydroxylated exclusively on the ring to give the corresponding 4-substituted 3-hydroxypyridines,...

A series of 1'-(6-aminopurin-9-yl)-1'-deoxy-N-methyl-β-d-ribofuranuronamides that were characterised by 2-dialkylamino-7-methyloxazolo[4,5-b]pyridin-5-ylmethyl substituents on N6 of interest for screening as selective adenosine A3 receptor agonists, have been synthesised. This work involved the synthesis of 2-dialkylamino-5-aminomethyl-7-methyloxazolo[4,5-b]pyridines and analogues that were cou...