Selective functionalization of complex scaffolds is a promising approach to alter the pharmacological profiles natural products and their derivatives. We report site-selective azidation benzylic aliphatic C-H bonds in molecules catalyzed by combination Fe(OAc)2 PyBox ligand. The same system also catalyzes trifluoromethyl olefins form derivatives containing both fluorine atoms azides. In general, reactions tolerate wide range functional groups occur with predictable regioselectivity. Azides...

Detailed studies on the origin of regioselectivity for formation branched products over linear have been conducted with complexes containing achiral triphenylphosphite ligand. The combination iridium and P(OPh)3 was first catalytic system shown to give high product among most selective forming any metal We active catalyst be generated from [Ir(COD)Cl]2 by cyclometalation phenyl group ligand such species resting state catalyst. A series allyliridium ligated resulting P,C competent...

We report the enantioselective functionalization of allylic C-H bonds in terminal alkenes by a strategy involving installation temporary functional group at carbon atom bond functionalization, followed catalytic diversification this intermediate with broad scope reagents. The method consists one-pot sequence palladium-catalyzed oxidation under neutral conditions to form linear allyl benzoates, iridium-catalyzed substitution. This overall transformation forms variety chiral products...

The synthesis and characterization of Imidazolium cation-based ionic liquids having different anions were reported in the present article. physicochemical spectral analyses used to characterized these liquids. theoretical studies using B3LYP method provide optimized structure, HOMO–LUMO plots, thermodynamic parameters, quantum descriptors. anti-corrosive property was observed 0.5 M H2SO4 corrosive medium at 303, 313, 323, 333 K temperatures by various strategies like gravimetric studies,...

Abstract The present article investigates the corrosion inhibition properties of N‐protected amino acids in .5 M H 2 SO 4 solution on mild steel by gravimetric studies, potentiodynamic polarization method, and impedance spectroscopic techniques at different temperatures. This evaluates synthetic methodology, characterization, theoretical studies acid inhibitors with their anticorrosive property. Theoretical were conducted gaseous phase through a 6‐31 G (d, p) basis set from B 3 LYP method....

Nonracemic ethano-bridged Tröger bases are prepared using CuTC-catalyzed decompositions of diazo compounds. Excellent levels diastereo- and enantio-control (dr ee up to 12:1 95% respectively) now obtained with aryl diazoketone precursors.

New functionalized ethano-bridged Tröger bases are readily prepared using a simple alkylation/rearrangement sequence which affords configurationally stable derivatives as single stereoisomers (de > 96%).

We report the palladium-catalyzed oxidation of hindered alkenes to form linear allylic esters. The combination palladium(II) benzoate, 4,5-diazafluoren-9-one, and benzoquinone catalyzes mild terminal with tert-butyl benzoyl peroxide as an oxidant in presence diverse functional groups. Selective trisubstituted disubstituted has been achieved, ability conduct reaction on a gram scale demonstrated. conditions high tolerance for auxiliary functionality make this method suitable synthesis...

The kinetics of corrosion iron in acid and base medium by weight loss method was investigated. studied sulphuric acid, nitric potassium hydroxide at different time intervals 25.0 ° C to 40.0 C. result showed that the rate vary with interval – concentration. order these media found be > hydroxide. Further specific reaction rate, half‐life time, energy activation, entropy activation enthalpy also evaluated.

In this work, a novel 1-Benzylpyridazinium bromide (BzPyBr) was synthesized using microwave irradiation and characterized by proton, carbon-13 mass spectroscopy. The corrosion inhibition behavior investigated in 0.5 M sulfuric acid on mild steel (MS) via experimental theoretical methods. BzPyBr exhibits the best efficiency of 97.52% at 1000 ppm (at 303K). PDP studies revealed it behaves as mixed-type inhibitor whereas impedance data confirmed its adsorption MS surface. Surface topography...

The influence of 3-methylpyridine and 3-nitropyridine on the corrosion rate aluminium in 1 mol L −1 potassium hydroxide solution was investigated using weight loss method. It observed that both derivatives behave as inhibitors. found inhibition efficiency increases with increasing inhibitor concentration. mechanism is discussed basis adsorption molecules metal surface. inhibitors were adsorbed surface according to Frumkin isotherm. effect temperature Al studied thermodynamic functions for...

Abstract Polyurethane composites synthesized by interaction of fly ash filler with polyether polyol, cross-linking agent, and curing agent in a certain ratio. The study’s findings show that the mechanical properties polyurethane composite are lowered hydroxyl moieties surface-functionalized chemically or physically linked. study also reveals prior subjecting samples ash–reinforced material for destructive analysis UTM evaluating properties. in-depth IR spectroscopy data is done focusing onto...

Abstract Increasing ecological awareness and stringent environmental regulations has resulted in development of green sustainable strategies for prevention corrosion. One such attractive strategy involves ionic liquids due to their interesting properties as low volatility, non‐flammability, nontoxic nature, high thermal chemical stability, ability adsorb on the metallic surface. In past few years, pyridazinium‐based have been studied corrosion inhibition. This review gives an update research...

A simple and facile synthesis of (+)-gloeosporone was developed using chirons that were available by lipase catalyzed acylation chemical resolution. Keywords: biocatalytic, enantiomeric, gloeosporone, resolution,