Macrocyclic 5-bromouracil derivatives: synthesis and transformation of a uracil ring
作者:Anton E. Nikolaev、Vyacheslav E. Semenov、Dilyara R. Sharafutdinova、Yurii Ya. Efremov、Vladimir S. Reznik
DOI:10.1016/j.tetlet.2008.07.164
日期:2008.10
Cyclization of 1,3-bis(ω-bromoalkyl)-5-bromouracil with p-methoxybenzylamine or sodium sulfide led to a series of pyrimidinophanes containing heteroatoms in bridges. An unusual behaviour of the 5-bromouracil ring, namely its contraction into hydantoin units during the cyclization reactions with p-methoxybenzylamine was observed. Sodium sulfide does not affect the 5-bromouracil ring, and no transformation