50874-28-7Relevant academic research and scientific papers
Mild preparation of functionalized [2.2]paracyclophanes via the Pummerer rearrangement
Montanari, Matteo,Bugana, Alberto,Sharma, Arvind K.,Pasini, Dario
supporting information; experimental part, p. 5018 - 5020 (2011/09/14)
[2.2]Paracyclophanes, incorporating functional groups in the aliphatic bridges, suitable for elimination to give [2.2]paracyclophanedienes, are synthesized through a novel approach. It relies on a double Pummerer rearrangement on dithiacyclophane precursors, followed by ring contraction through a photochemical sulfur extrusion, and it is compatible with aryl moieties possessing very different electronic properties. The Royal Society of Chemistry 2011.
Host-guest interactions in a series of self-assembled As2L 2Cl2 macrocycles
Cangelosi, Virginia M.,Zakharov, Lev N.,Fontenot, Sean A.,Pitt, Melanie A.,Johnson, Darren W.
, p. 3447 - 3453 (2008/12/20)
The reaction of AsCl3 with H2L (where L = a rigid dithiolate) results in the self-assembly of As2L2Cl 2 supramolecular macrocycles. For ligands 4,4′- bis(mercaptomethyl)biphenyl (H21), 4,4′-bis(mercaptomethyl)- trans-stilbene (H22), and 1,4-dimethoxy-2,5-bis(mercaptomethyl) benzene (H23), the macrocyclic cavities of the resulting assemblies are large enough to host aromatic solvent molecules, as revealed by single crystal X-ray structures of the inclusion complexes. As2L 2Cl2 macrocycles form in solution as a mixture of diastereomers, but the diastereomers can be selectively crystallized and separated. Crystallization of syn- or anti-As232Cl 2 can be controlled using host-guest interactions by the prudent choice of crystallization solvents. anti-As232Cl 2 crystallizes exclusively from chloroform and benzene, while a [(syn-As232Cl2)2?p-xylene] dimer crystallizes from p-xylene and a mixture of [(syn-As23 2Cl2)(anti-As232Cl 2)?toluene] and [(syn-As232Cl 2)2?toluene] dimers crystallize from toluene.
