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The title diesters (11-15; halo substituents F, Cl, Br, I) were prepared by DCC-induced cyclization of the precursor 5'-monophosphate or direct halogenation of the 2'-deoxyuridine 3',5'-cyclic(More)
R(P)- and S(P)-diastereomers of 5'-dimethoxytrityl-thymidine-3'-O-[O-(2-cyanoethyl)-N,N-diisopropyl]-phosphoramidite (T-CED) were separated by silica gel chromatography. Oxidation of both isomers(More)