A bidirectional ortho metalation of the readily available chiral diol hydrobenzoin has been developed that provides direct access to new ortho-functionalized hydrobenzoin derivatives. This one-pot procedure should broaden the utility of hydrobenzoin as an auxiliary and ligand in asymmetric synthesis.

Palladium-catalyzed highly regioselective carbonylation of substituted N,N-dimethylbenzylamines with the assistance of LiCl was developed. The ortho-functionalized N,N-dimethylbenzylamine was further transformed into ortho-methyl benzoate under mild conditions. These two transformations could be combined into one pot to produce the desired product in moderate yield. Applications of this methodo...

in this research degradation and mineralization of ortho-toluidine (ot) in the wastewater of petrochemical industries was investigated by uv/tio 2 process in a batch recirculating photo reactor. the influence of different variables such as initial ph, amount of tio 2 and initial concentration of ot on the reaction rate was investigated. in optimum conditions (1.75 g/l of catalyst, ph at 7 and i...

Rotational and vibration-rotational Raman spectra of fluid hydrogen (H2) at room temperature were investigated through spectroscopy under pressure. All the rotational lines showed rapid pressure changes in shifts around 0.56 GPa. The peak analyses revealed that ortho-para conversion H2 was generated beyond GPa temperature. Supposedly, anomalies obtained corresponded to a phase transition phase,...

The objective of the present study was to evaluate the cytotoxicity and degree of monomer conversion of resin-reinforced glass ionomer cements (RGIC) over different time periods. Four RGICs: Fuji Ortho LC (FOLC), Fuji Ortho Band (FOB), Orthoglass (OGL), and Multicure Glass Ionomer (MCI) were evaluated for cytotoxicity in fibroblastic L929 cells and for their degree of monomer conversion over di...

BACKGROUND SpyTag is a peptide that can form an irreversible covalent linkage to its 12 kDa partner SpyCatcher via a spontaneous isopeptide bond. Herein, we fused SpyTag at the N-terminal of lichenase and SpyCatcher at C-terminal so that the termini of lichenase were locked together by the covalent interaction between the partners. In addition, an elastin-like polypeptides tag was subsequently ...

The synthesis of a new DNA building block that bears the metal ion ligand 2,9-bis-mesityl-3-ethynyl-phenanthroline attached to the 5-position of 2'-deoxyuridine is presented. In the presence of Zn(2+), Cu(2+), Fe(2+) and Ni(2+) the complex formation of an accordingly modified DNA double strand with a second DNA duplex bearing the 2,2':6',2''-terpyridine ligand was studied by optical spectroscop...

The interpretation of nuclear magnetic resonance (NMR) chemical shifts plays an increasingly important role in the structure elucidation flavonoids. Despite fact that 3H signal methoxy (OMe) group appears as a singlet 1 H NMR spectrum, its shift is not reliably indicative OMe-substitution aromatic rings, unlike 13 C shift, which can be useful for determination molecular For example, ortho-subst...

It is common practice for unmanned aerial vehicle (UAV) flight planning to target an entire area surrounding a single rooftop’s photovoltaic panels while investigating solar-powered roofs that account only 1% of the urban roof area. very hard pre-flight route setting autopilot specific (not rooftop) capture still images with high overlapping rates panels. This causes serious unnecessary data re...