Heterocyclic chemistry

The year 2006 was very busy and productive for the heterocyclic community. Particular highlights include a stereoselective epoxidative ring-closure of amino-ketones, new reagents for the direct formation of NH-aziridines from enones, the first example of a metal-free aziridination using sulfonamides as a nitrene source, a short and flexible synthesis of multi-substituted pyrroles, the first example of a radical addition to a pyridine nitrogen, a facile method for tetrahydrothiophene formation through intramolecular hydrothiolation, a very versatile single-step pyrimidine synthesis, and two conceptually advanced large-ring forming reactions.