Abstract
The use of the microwave (MW) technique has many advantages in organophosphorus chemistry. MW irradiation may replace a catalyst, or simplify a catalytic system. New reactions may also become possible under MW irradiation. In most cases, microwaves just make the reactions more efficient in respect of rate, selectivity and yield. The benefits are shown via representative examples. In another field, our methods developed for the resolution of cyclic phosphine oxides and phosphinates are summarized. After deoxygenation, the racemic or optically active P-heterocycles were used as P-ligands in platinum complexes that together with other derivatives are potential catalysts. The third topic embraces the optimization of the synthesis of dronic acids/dronates. Starting from the corresponding carboxylic acids and using methanesulfonic acid as the solvent, 3 equivalents of phosphorus trichloride is enough as the P-reactant. Applying sulfolane as the solvent, the optimum set of reactants comprises 2 equivalents of phosphorus trichloride and phosphorous acid.
Highlights
In this minireview, our recent results in environmentallyfriendly (“green”) chemistry have been summarized
Our methods developed for the resolution of cyclic phosphine oxides and phosphinates are summarized
The racemic or optically active P-heterocycles were used as P-ligands in platinum complexes that together with other derivatives are potential catalysts
Summary
Our recent results in environmentallyfriendly (“green”) chemistry have been summarized. In the first sub-chapter the usefulness of the microwave technique is shown in organophosphorus chemistry. The use of the microwave (MW) technique in organic syntheses spread fast in research laboratories, and after almost three decades it is close to gaining industrial applications [1]. These days, sophisticated MW equipment is available and utilized on a wide scale of syntheses, such as substitutions, acylations, esterifications, alkylations, C–C coupling reactions, additions, eliminations, condensations, cycloadditions, rearrangements and the formation of heterocycles [2]. The advantages of the application of the MW irradiation are shown via selected examples
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