Leprosy is caused by invasion of Mycobacterium leprae bacilli occurring intracellularly. The innate methods by which the human body meets the challenge of invading live microbes is to destroy the microbes through an activation system leading to biochemical production of oxygen and other free radicals by the phagocytic cells[1] . Reactive Oxygen species (ROS) released during bacterial phagocytos...

The synthesis of a new type of Hoveyda-Grubbs 2(nd) generation catalyst bearing a modified N-heterocyclic carbene ligands is reported. The new catalyst contains an NHC ligand symmetrically substituted with chromanyl moieties. The complex was tested in model CM and RCM reactions. It showed very high activity in CM reactions with electron-deficient α,β-unsaturated compounds even at 0 °C. It was a...

The 2-pyrone moiety can be found in a large number of natural products with wide range biological activities, including antibiotic, antifungal, cytotoxic, neurotoxic, phytotoxic, anti-inflammatory and cardiotonic effects. With its heterocyclic structure encompassing the chemical nature conjugated dienes, lactones, Michael acceptors arenes, it undergo great variety transformations such as cycloa...

The objective of this review is to provide a current overview of the rapidly developing chemistry of organometallic complexes and particularly organoiron complexes useful in asymmetric and stereoselective reactions. Also covered are stereoselective reactions of α, β-unsaturated acyl ligands bound to the chiral auxiliary [(η5-C5H5) Fe(CO)(PPh3)] and new applications of organoiron complexes in th...

Intramolecular vicinal and geminal frustrated Lewis pairs (FLPs) featuring bulky substituents at phosphorus or nitrogen and strongly electron-withdrawing bulky pentafluorophenyl substituents at boron undergo a variety of addition and/or activation reactions with small molecules. A number of examples of such reactions are presented and discussed, among them the FLP activation of dihydrogen to gi...

Azines (2,3-diazabuta-1,3-dienes) are a widely used class of compounds with conjugated C=N double bonds. Herein, we present a direct synthesis of azines from alcohols and hydrazine hydrate. The reaction, catalyzed by a ruthenium pincer complex, evolves dihydrogen and can be run in a base-free version. The dehydrogenative coupling of benzylic and aliphatic alcohols led to good conversions and yi...