Current Organic Chemistry - Volume 7, Issue 8, 2003

New efficient synthetic routes for preparation of molecular and macromolecular organosilicon compounds based on silicon-containing alkene metathesis and metathesis polymerization catalyzed by transition metals (W, Mo, Re and Ru), which initate the formation of metal carbenes (ill-defined first generation catalysts), or by metallacarbene complexes (second generation catalysts, most of which are well defined) are re Read More

This review introduces the recent progresses on the fixation of carbon dioxide (CO2) including 1) the reactions of carbon dioxide with alcohols in the presence of base; 2) the reactions of carbon dioxide with amines in the presence of base; and 3) the transition metal catalyzed carbon dioxide insertion reactions. In the section of transition metal catalyzed fixation of carbon dioxide, we mainly focus on the catalytic process of car Read More

The radical nucleophilic substitution mechanism or SRN1 is a chain process, in which radicals and radical anions are intermediates. This process has been extensively used to effect substitution on a wide variety of substrates. The SRN1 reaction has been studied from both mechanistic and synthetic standpoints.The SRN1 mechanism requires an initiation step. Spontaneous electron transfer (ET) from the nucleophile to the s Read More

This article (the third of three parts) reviews the use of 1,3-dipolar cycloaddition reactions of azides, diazo compounds, nitrile imines, azomethine imines and azomethine ylides in the construction of carbohydrate mimics. Preparation of triazole, tetrazole and other modified nucleosides, azasugars, polyhydroxylated alkaloids and carbocycles, pyrazolidine and pyrazoline systems is described. It is organized depending on th Read More