A matrix‐bound superoxide radical anion, generated by treating Ti(OR)4 (R=iPr, nBu) with H2O2, is a selective heterogeneous catalyst for the oxidation of anilines to the corresponding nitroarenes with 50 % aqueous H2O2 [Eq. (1)]. Yields of 82–98 % are obtained, even with anilines bearing electron‐withdrawing substituents (R=NO2, COOH).

A single step conversion of aromatic aldehydes (1) into the corresponding nitriles (2) has been achieved in high yields using stoichiometric amounts of hydroxylamine hydrochloride, pyridine and formamide in refluxing xylene.

Ein matrixgebundenes Superoxid‐Radikalanion, erzeugt durch Umsetzung von Ti(OR)4 (R=iPr, nBu) mit H2O2, ist ein selektiver heterogener Katalysator für die Oxidation von Anilinen zu den entsprechenden Nitroarenen mit 50‐proz. H2O2 [Gl. (1)]. Die Ausbeuten betragen 82–98 %, selbst mit Anilinen, die elektronenziehende Substituenten (R=NO2, COOH) enthalten.

diastereoselective syntheses, enantioselective syntheses diastereoselective syntheses, enantioselective syntheses (incl. cis/trans-isomerism) O 0031 20 -027 A Convenient Synthesis of d-Sotalol. -A new and simple route for the synthesis of both the antiarrhythmic drugs d-Nifenanlol (V) and d-Sotalol (VIII) using the Sharpless asymmetric dihydroxylation of 4-nitrostyrene (I) followed by regiospecific opening of chiral cyclic sulfate (III) with isopropylamine (IV) as key steps is accomplished. -(PHUKAN, PRODEEP; JAGTAP, H. S.; SUDALAI, A.; Indian J. Chem., Sect. B: Org. Chem. Incl. Med. Chem. 39 (2000) 12, 950-953; Div. Process Dev., Natl. Chem. Lab., Pune 411 008, India; EN)