Mohamed Elsherbini

Enantioselective diamination with novel chiral hypervalent iodine catalysts

Abstract Vicinal diamines constitute one the most important functional motif in organic chemistry because of its wide occurrence in a variety of biological and pharmaceutical molecules. We report an efficient metal‐free, highly stereoselective intramolecular diamination using a novel chiral hypervalent iodine reagent together with its application as an efficient catalyst for the synthesis of diamines.

Synthesis, Anti-Inflammatory, and Analgesic Evaluation of Some 2-Amino-5-Selenothiazoles

GRAPHICAL ABSTRACT Abstract Treatment of 2-aminothiazole (1) with triselenium dicyanide (2) afforded selenocyanate (3). Reduction of 3 with NaBH4 gave the diselenide 4. Compounds 3 and 4 were used as a key intermediate for the synthesis of a series of 2-amino-5-selenothiazoles. The newly synthesized compounds were evaluated as anti-inflammatory and analgesic agent.

Hypervalent iodine reagents by anodic oxidation: a powerful green synthesis

The anodic oxidation of aryl iodides is a powerful method for the synthesis of hypervalent iodine reagents, which eliminates the necessity to use expensive or hazardous chemical oxidizing reagents. The hypervalent iodine reagents generated at the anode are successfully used as either in-cell or ex-cell mediators for different valuable chemical transformations such as fluorinations and oxidative cyclizations. More recently, recyclable mediators and catalytic protocols have been developed.

Electron-Deficient Chiral Lactic Acid-Based Hypervalent Iodine Reagents

Novel electron-deficient chiral hypervalent iodine reagents were prepared in good overall yields. The reactivity and stereoselectivity of these reagents in oxidative rearrangements of alkenes to α-aryl ketones were investigated. The results show that the new reagents have good reactivity and generate products with high enantiomeric excess.