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Unnatural bases, 2-amino-6-(2-thienyl)purine and 2-amino-6-(2-furanyl)purine, were newly designed to replace the previously developed purine analogue, 2-amino-6-(N,N-dimethylamino)purine, which specifically pairs with pyridin-2-one. These nucleoside derivatives were synthesized via the 6-substitution of 6-iodopurine nucleosides with tributylstannylthiophene or tributylstannylfuran. As compared with...
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