Thymine and 2',3',5'-tri-O-acetyl-psi-uridine (1) was converted into the corresponding 2,4-ditriazolyl derivatives 5 and 2, respectively. Of these two substituents, the C4-triazolyl group was found to be quite susceptible to nucleophilic substitution while the other triazolyl is resistant.
胸腺
嘧啶和2',3',5'-三-O-乙酰基-psi-
尿苷(1)分别转化为相应的2,4-二三唑基衍
生物5和2。在这两个取代基中,发现C4-三唑基对亲核取代非常敏感,而另一个三唑基具有抗性。