Current Organic Chemistry - Volume 9, Issue 6, 2005

Transition-metal-catalyzed or -mediated intramolecular [2 + 2 + 2] alkyne cyclotrimerizations are one of the most efficient method to construct highly substituted arene frameworks in a single operation. The recent developments of novel catalyst systems as well as new strategies render the intramolecular cyclotrimerizations more and more attractive tools in practical organic synthesis. This review surveys most recent resear Read More

The construction of biomolecular, supramolecular, nano-molecular structures and host-guest interaction occurs by composite of many interactions, i.e., electrostatic, cation-dipole, hydrogen bond, van der Waals, π-_π , cation-π, XH-π, etc. Some of these can be seen in host-guest chemistry, sometimes in almost pure form: the convergence of binding sites and rigid geometry, and isolated environments make it possible. In this Read More

Suzuki coupling is probably the most versatile approach among the cross-coupling reactions and the reaction has long been the subject of intensive work in the area of transition-metal chemistry. From both scientific and environmental points of view, various modifications have recently been developed that the Suzuki reactions involve catalysts, substrates, reaction media, reaction conditions and synthetic techniques. This revi Read More

The account highlights an important approach to supramolecular self-assembly via “vector-manipulation at metal centers” ranging from Werner-system to Cotton-system coordination compounds. The approach has been successfully employed in the architecture of container molecules like metal analogues of the bowl-shaped calixarenes and metal-linked calixarene-based carcerands and carceplexes. The concepts of metal Read More

The redox chemistry of different nitro compounds of biological significance is focused to understand how the reduction of the nitro group can play an active role in several aspects as: electroanalytical determinations, free radical generation and stability and free radical reactivity. We have focused our studies to a lot of pharmaceuticals belonging mainly to the following families: calcium antagonists as nitrobenzene substitut Read More