An efficient solid-phase synthesis of 2-alkyl-4,6-diaminopyrimidines and 2,4,6-triaminopyrimidines
作者:Csaba Wéber、Ádám Demeter、István Greiner
DOI:10.1016/j.tet.2005.12.004
日期:2006.3
4-chloro-6-aminopyrimidine intermediates. Aromatic nucleophilic substitution with various aliphatic amines or the corresponding lithium amides afforded the desired aminopyrimidines in high yield and excellent purity after acidic cleavage from the resin. The products were characterized by LC–MS, 1H and 13C NMR spectroscopy. Deuterium exchange experiments revealed that the investigated aminopyrimidines have
描述了一种固相合成2,4,6-三氨基嘧啶和2-烷基-4,6-二氨基嘧啶的有效而简单的方法。通过还原胺化将伯胺固定在2-(4-甲酰基-3-甲氧基苯氧基)乙基聚苯乙烯树脂上。两种不同的4,6-二氯嘧啶的连接导致相应的4-氯-6-氨基嘧啶中间体。从树脂上酸裂解后,用各种脂肪族胺或相应的锂酰胺进行的亲核亲核取代反应,可以高收率和极好的纯度提供所需的氨基嘧啶。产品通过LC-MS,1 H和13 C NMR光谱进行了表征。氘交换实验表明,所研究的氨基嘧啶具有C-5质子化的一般趋势。