20717-80-0Relevant academic research and scientific papers
Synthesis, Structure and Properties of Fused π-Extended Acridone Derivatives
Gao, Hongshuai,Zhang, Gang
supporting information, (2020/08/26)
Benzene- and naphthalene-fused acridone derivatives with hexyl and phenyl groups at the amino position were synthesized and their properties were investigated experimentally and computationally. All the structures of these fused π-extended acridone derivatives were unambiguously confirmed by single-crystal X-ray analysis, which revealed the presence of face-to-face π–π stackings along the acridone moiety and the intermolecular hydrogen bond-directed molecular packings of the phenyl-substituted acridone derivatives in the crystals. Moreover, the dimerization of linearly fused acridone derivative was observed after storing the crystals over months. The benzene ring at the turning point of the angularly fused acridone derivatives contained relatively longer and shorter C–C bonds, which affected the molecular conjugation, as confirmed by the results of photophysical characterization and the study of the aromaticity. Mobility calculations based on the molecular packings in the single crystals showed that the linearly fused acridone derivatives bearing better electron and hole mobilities are good candidates of organic functional materials.
Total synthesis of (+)-xestoquinone using an asymmetric palladium-catalyzed polyene cyclization
Maddaford, Shawn P.,Andersen, Neil G.,Cristofoli, Walter A.,Keay, Brian A.
, p. 10766 - 10773 (2007/10/03)
The first total asymmetric synthesis of (+)-xestoquinone (I) has been accomplished in 68% ee by a palladium(0)-catalyzed polyene cyclization of naphthyl triflate 44 using (S)-(+)-BINAP as the chiral ligand. Attempts at an asymmetric polyene cyclization using the corresponding naphthyl bromide 41 gave poor enantioselectivities even in the presence of silver salts, thus exemplifying the effect of the coordination state of palladium on the enantioselectivity. A new method for the preparation of 6,7-dihydroisobenzofurans is also described using a [1,2]-Wittig rearrangement on a seven-membered cyclic ether precursor.
