Simple and easy functionalization of -hydroxy POCOP-M (M = Ni(II), Pd(II)) pincer complexes: synthesis of multimetallic species.

A facile and efficient method for synthesizing mono- and bi-metallic pincer complexes (3-Ni/Ni and 3-Ni/Pd) has been developed. The procedure involves a 1 : 1 stoichiometric reaction of a -hydroxy POCOP pincer complex with cyanuric chloride in the presence of [NaB(OMe)], which selectively affords the mono-substituted pincer complexes (2-Ni and 2-Pd). These complexes are then further reacted with another equivalent of the -hydroxy POCOP pincer complex to produce the desired multimetallic species (3-Ni/Ni and 3-Ni/Pd).

Beyond 1,2,3-triazoles: Formation and Applications of Ketemines Derived from Copper Catalyzed Azide Alkyne Cycloaddition.

Ketemines represent an interesting class of organic intermediates that has undergone a regrowth as a consequence of recent extensions of copper catalyzed azide alkyne cycloaddition (Cu- AAC) to other synthetic fields. This review summarizes the most recent generation methods of ketimines from CuAAC reaction, highlighting chemical properties focused on the synthesis of cyclic compounds, among others, affording a general outlook towards the development of new biologically active compounds.

Synthesis and Development of Indole Based 5-HT3 Receptor Antagonists as Anti-Emetic Drugs in Oncology: An Update.

An important group of antiemetic drugs used in the treatment of nausea and vomiting after chemotherapy containing an indole moiety in their structures, working as 5- hydroxytryptamine type 3 serotonin receptor antagonist (5-HT3). This study focuses on compounds bearing an indole core that present a 5-HT3 receptor antagonist activity, which have been successfully used as antiemetic drugs for reducing chemotherapy adverse secondary effects during cancer treatment. Their synthesis, biological activities, and some outstanding characteristics are discussed, providing a general outlook towards the development of more efficient antiemetic drugs.

Bifunctional colorimetric chemosensing of fluoride and cyanide ions by nickel-POCOP pincer receptors.

Three Ni(ii)-POCOP pincer complexes [NiCl{CH-4-OH-2,6-(OPPh)}], 1; [NiCl{CH-4-OH-2,6-(OPtBu)}], 2 and [NiCl{CH-4-OH-2,6-(OPiPr)}], 3 were studied as bifunctional molecular sensors for inorganic anions and acetate. In CHCN, fluoride generates a bathochromic shift with a colorimetric change for 1-3 with a simultaneous fluorescence turn on, this optical effect is based on deprotonation of the para-hydroxy group of the POCOP ligand. On the other hand, in a neutral aqueous solution of 80 vol% CHCN, additions of cyanide produce a distinct change of color by forming very stable complexes with the nickel-based receptors 1-3 with log K in the range of 4.

A comparative study of the packing of two polymorphs of the nickel(II) pincer complex [2,6-bis(di-tert-butylphosphinoyl)-4-(3,5-dinitrobenzoyloxy)phenyl-κ(3)P,C(1),P']chloridonickel(II).

Pincer complexes can act as catalysts in organic transformations and have potential applications in materials, medicine and biology. They exhibit robust structures and high thermal stability attributed to the tridentate coordination of the pincer ligands and the strong σ metal-carbon bond. Nickel derivatives of these ligands have shown high catalytic activities in cross-coupling reactions and other industrially relevant transformations.

N-Benzyl-2-hy-droxy-ethanaminium cyanurate.

In the cation of the title compound C9H14ON(+)·C3H2O3N3 (-), the benzyl-amine C-N bond subtends a dihedral angle of 78.3 (2)° with the phenyl ring. The cyanurate anion is in the usual keto-form and shows an r.

1,3-Bis[(naphthalen-2-ylsulfan-yl)meth-yl]benzene.

Mol-ecules of the title compound, C(28)H(22)S(2), are located on a crystallographic mirror plane with one half-mol-ecule in the asymmetric unit. The dihedral angle between the phenyl ring and the naphthyl unit is 83.14 (7)°.