(2,5)Pyrimidinophanes: Synthesis and Molecular Structure
The title compounds 1 and 2 are synthesized by photolytic sulfur extrusion from 2,11-dithia(2,5)pyrimidinophane 17.The molecular structures of 1 and 2 are determined by X-ray structure analysis and are discussed with regard to the steric strain in these molecules.Thermolysis of - or -trimethylammonium hydroxide (10 or 11) does not generate 1 and 2. α-Chlorination of 2,5-dimethylpyrimidine (3) with N-chlorosuccinimide provides the required precursors 4 - 6.
Eiermann, Uwe,Krieger, Claus,Neugebauer, Franz A.
p. 1885 - 1889
(2007/10/02)
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