Absolute Helical Arrangement of Stacked Benzene Rings: Heterogeneous Double‐Helical Interaction Comprising a Hydrogen‐Bonding Belt and an Offset Parallel Aromatic–Aromatic‐Interaction Array

Abstract

Trennung ist die Konsequenz: Selbstorganisierte chirale Überstrukturen, resultierend aus zwei unterschiedlichen helicalen Wechselwirkungen, wurden in der Kristallstruktur der achiralen Verbindung 1 gefunden. Durch die Wechselwirkungen entstehen Ar‐H⋅⋅⋅π‐ und OH⋅⋅⋅OC‐Anordnungen. Das Racemat der Helices spaltet sich spontan in individuelle Einkristalle. Nur eine der Hydroxygruppen (grün) ist an der Bildung der helicalen wasserstoffverbrückten Anordnungen beteiligt.

Di‐ and Dodeca‐Mitsunobu Reactions on C60 Derivatives: Post‐Functionalization of Fullerene Mono‐ and Hexakis‐Adducts

“…[12] Subsequent diesterification of malonic acid was performed in the presence of DCC in 97 % yield. Hexakis-adduct 3 was then readily synthesized by using the optimized conditions described by Y.-P. Sun.…”

Synthesis of 1,2,3-triazole ligands, their metal complexes, and applications in catalysis; Gold (I) catalyzed 1,n-enyne ester cycloisomerization reactions

“…Initially, product 81 was divided into two equal portions. The hydroxyl group of one portion was protected with TBDMS-Cl 41 to give 82, and the NH group of the other portion was protected with methyl pivaloylchloride to give 83 and 84. These two compounds were obtained in a 1:1 (90%) ratio of N-1 and N-2 isomers.…”