An Improved Post-Synthetic Substitution Approach for Synthesis of Oligodeoxynucleotides Containing Labile 4-Substituted Thymines

Abstract
A simple procedure is described for the preparation of a versatile oligodeoxynucleotide which contains 4-phenylthiothymidine. This versatile oligomer has been successfully used for synthesis of oligonucleotides containing labile 5-methyl-N4, N4-ethanocytosine (7) or 4-azido-5-methyl-2-pyrimidinone-1-β-(2′-deoxyriboside) (8).

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