79837-77-7Relevant academic research and scientific papers
Directed Synthesis of Translationally Isomeric -Catenanes
Rissler, Klaus,Schill, Gottfried,Fritz, Hans,Vetter, Walter
, p. 1374 - 1399 (2007/10/02)
In a multi-step reaction sequence the tetrahydroxymetacyclophane 12c is synthesized.Acetalisation with 1,25-dichloro-13-pentacosanone followed by nitration and reduction afforded the diamine 13c.By cyclization of this compound in 2-pentanol with sodium carbonate and sodium iodide under high dilution conditions the monomeric products 16, 17, and 18 are obtained in yields of 21.4, 7.7, and 0,9percent, respectively.On the basis of mass, 13C NMR and 1H NMR spectra the structure of these compounds is discussed.Starting from the precatenane 16 the -catenanes 25a,b,c and 26a,b,c are obtained in a multi-step reaction sequence.The structure of these compounds is confirmed by mass, 13C NMR, and 1H NMR spectroscopic investigations.
