Synthesis and 1H NMR spectrum of N6β²,N9-
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Russell A Bell; Howard N Hunter
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Article
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1987
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Elsevier Science
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French
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N6',N9-Octamethylenepurine cyclophane, 1 ,has been synthesized by intramolecular cyclization. Its pmr spe7trum shows all 16 methylene protons to be resolved, their chemical shifts ranging from -0.6 to +4.8 ppm. Much interest has been expressed in the chemical shift effects of the aromatic purine and