The cover design illustrates a novel stereoselective approach to the synthesis of 1,2-diarylethane-1,2-diamines. The method proposed in this article utilizes widely available aromatic aldehydes and ammonia as starting substances. The stereoselectivity of the formation of cis-2,4,5-triarylimidazoline is due to Woodward–Hoffmann rules in the electrocyclic reactions. In article number e202400305 by Daniil R. Bazanov and Natalia A. Lozinskaya, the possibility of reduction of the amidine fragment of imidazoline with metallic sodium in tert-butyl alcohol was shown. This method allows to obtain alkyl- and alkoxyphenyl derivatives of meso-1,2-diarylethane-1,2-diamines in high yields. The ability to scale up the method to muttigram quantities is shown. A possible side reaction of the reduction to dibenzylamine derivatives is also shown on the cover design.
An efficient enantioselective synthesis of tetrahydro-β-carbolines using in situ generated chiral Pd-monothiosquaramides (Pd-MTSQs) was attempted. The Pd-MTSQs catalyzed imine reduction of dihydro-β-carbolines and produced chiral THBCs with excellent selectivity (up to 98% ee). Chiral alkyl-THBC isomers were observed with R configuration and S configuration perceived for chiral Aryl-THBCs. More details can be found in article number e202400245 by Nachtigall, Leonardo S. Santos, and co-workers.
This cover highlights direct polymer modification of titania nanotube (TNT) surfaces via UV-irradiated radical polymerization and is drawn in a manga style. Vinyl monomers were reacted by UV-irradiated radical polymerization using titania nanotubes. The direct in situ polymer modification of TNTs was achieved without pretreatment of titania. The resulting polymer-modified TNTs retain the original photocatalytic properties. More details can be found in article number e202400270 by Tomonari Tanaka and co-workers.
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