and DABCO–THF as an appropriate system for activation in a chemoselective Strecker–Ugi type reaction, has rendered ethyl glyoxalate and various heterocyclic-2-amidines as feasible substrates, and afforded the successful synthesis of 3-amino-2-carboxyethyl substituted fused imidazoles as useful building blocks. This class of functional scaffold has provided, via construction of the fused pyrimidinone
TMSCN作为功能性异腈等效物的去甲
硅烷基化活化途径以及
DABCO-THF作为
化学选择性Strecker-Ugi型反应中活化的合适系统,已使
乙二醛酸
乙酯和各种杂环-2-am成为可行的底物,并提供了成功地合成了3-
氨基-2-羧乙基取代的稠合
咪唑作为有用的结构单元。这类功能性支架通过融合
嘧啶酮基序的构建,提供了
生物学上重要的C8–N9环化
嘌呤,
腺嘌呤及其氧代/
硫代类似物的合成。这种新方法既方便又灵活,可用于制备通用的
嘌呤缩合杂环。