Oxidative addition reactions of Pd(PPh3)4 on the pyrimidine nucleosides 3',5'-di-Oacetylthymidine and 3',5'-di-O-acetyl-4-chlorothymidine and on the nucleobase 1-methylthymine have been investigated. N3 and C4 metal coordinated complexes 3 and 7 were isolated and characterized by spectroscopic techniques. Moreover, the crystal structure of the trans- [PdCl(1-methyl thymine)(PPh3)2]H2O is reported.
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