Mehrphotonen‐Fabrikation ermöglicht die Herstellung von komplexen dreidimensionalen Strukturen mit charakteristischen Mustern in der Größenordnung 100 nm oder darunter aus einer Bandbreite unterschiedlicher Materialien. In ihrem Aufsatz auf S. 6352 ff. diskutieren J. T. Fourkas et al. die Entwicklung dieser Technik seit ihrer Einführung vor rund zehn Jahren sowie die verwendeten Materialien, Methoden und Anwendungen zum Aufbau funktioneller Bauelemente.

A novel route to substituted phenanthrenes and polycyclic heteroarenes by direct, Pd-catalyzed, intramolecular aryl-

A novel route to 2,3-substituted benzo[b]thiophenes by intramolecular radical cyclization of polarized ketene dithioacetals derived from o-bromoarylacetonitriles or the corresponding 3-(methylthio)-3-alkyl/aryl/heteroaryl analogues has been reported.

A novel 1,2-dinucleophile engages two imines in a sequential vinylogous Mannich-Mannich-Pictet-Spengler process to generate complex hexahydropyrrolo[3,2-c]quinolines in a one-pot operation. This methodology provides a rapid, highly modular, and flexible access toward a wide range of products and forms four new σ-bonds and chiral centers each. The diastereoselectivity may be inverted by fine-tuning of reaction conditions and the electronic nature of the imines.

A simple strategy for the synthesis of substituted tetrahydroquinolines through regio- and stereoselective ring opening of N-tosyl aziridines with carbon nucleophiles generated from 2-(bromoaryl)acetonitriles followed by palladium-catalyzed intramolecular C-N cyclization is reported in excellent yields (up to >99%) and stereoselectivity (ee and de up to >99%).