Templated DNA strand ligation by the ring-strain promoted alkyne-azide [3+2] cycloaddition reaction is very fast; with dibenzocyclooctyne, the reaction is essentially complete in 1 min. It is inhibited by the presence of a single mismatched base pair suggesting applications in genetic analysis.

The synthesis of 16-electron complexes of the type (Cy-PSiP)RuX(L) (Cy-PSiP = κ3-(2-Cy2PC6H4)2SiMe) is reported. Treatment of (Cy-PSiP)H with one equiv. RuCl2(PPh3)3 in the presence of Et3N afforded a mixture of (Cy-PSiP)RuCl(PPh3) (1) and [(Cy-PSiP)RuCl]2 (2), which exists in a temperature-dependent equilibrium process involving reversible dissociation of PPh3 from 1 to form 2. While treatment...

ABSTRACT By cycloaddition reaction of sodium azide with chalcone in the presence of CuO as a catalyst in DMF a 1,2,3-triazole are prepared in reaction with pentafluoropyridine to give 2-(tetrafluoropyridin-4-yl)-1,2,3-triazole derivatives in good yields and high regioselectivity. The regioselectivity of the compounds are confirmed by 19F-NMR and other spectroscopy. GRAPHICAL ABSTRACT

The title compound, [Zn(2)(C(14)H(13)N(2)O)(2)(N(3))(2)], is a phenolate-bridged centrosymmetric dinuclear zinc(II) complex. The Zn⋯Zn distance is 3.076 (1) Å. Each Zn atom is five-coordinated by two O and two N atoms from two Schiff base ligands, and by one azide N atom, forming a square-pyramidal geometry.

The pseudo-four component click synthesis of dibenzylated 1,2,3-triazoles derived from aniline is reported. The cycloaddition of sodium azide to N-(prop-2-ynyl)-benzenamine (I) in the presence of equimolar amounts of p-substituted benzyl derivatives, yields a mixture of mono- and dibenzylated 1,2,3-triazoles. When two equivalents of the benzyl derivative are added to the multicomponent reaction...

Insulin-resistant type 2 diabetic patients have been reported to have impaired skeletal muscle mitochondrial respiratory function. A key question is whether decreased mitochondrial respiration contributes directly to the decreased insulin action. To address this, a model of impaired cellular respiratory function was established by incubating human skeletal muscle cell cultures with the mitochon...

More than thirty years have already elapsed since we introduced diphenyl phosphorazidate (diphenylphosphoryl azide, DPPA, (PhO)2P(O)N3) as a reagent for organic synthesis in 1972 (Figure 1). During these years, DPPA has been found to be effective for a variety of organic reactions as a versatile synthetic reagent. It is not too much to say that DPPA has secured an established position as a reag...

The synthesis of the first terminal imido complex of cobalt, [PhBP3]CoN-p-tolyl, is reported. Its synthesis proceeds by oxidative group transfer from cobalt(I) upon addition of tolyl azide at room temperature. This species and a related eta1-diazoalkane adduct have been structurally characterized. The diamagnetic imido complex [PhBP3]CoN-p-tolyl reacts with CO to liberate isocyanate and the cob...

DFT calculations have been performed to study the reaction mechanism of N-N bond formation from aryl azide catalyzed by the copper(I) iodide complex. We studied various activation modes for the azide group, and found that the azide group is activated by the Cu(μ-I)2Cu(TMEDA) dimer coordinating to the N-atom of phenyl imine and the internal N-atom of azide.

In the centrosymmetric binuclear title complex, [Cu(2)(C(13)H(19)N(2)O)(2)(N(3))(2)], the Cu(II) atom adopts an elongated CuON(4) square-based pyramidal coordination geometry, arising from the N,N',O-tridentate ligand and two bridging end-on azide anions. The O atom is in the basal plane, one of the azide N atoms is in the apical site and the Cu⋯Cu separation is 3.2365 (3) Å. A pair of intra-mo...