Tetrazolium N-Aminides: Complementary Studies on Synthesis and Properties
作者:Dietrich Moderhack、Matthias Noreiks
DOI:10.3987/com-09-11760
日期:——
Attempts are made to access the title compounds from N-amido/ureidotetrazoles (A, B; 1H- / 2H-system). These materials are provided by acylation of the respective N-aminotetrazoles (A in one step, B partly by hydrolysis of diacylated derivatives which are obtained directly). On treatment with excess dimethyl sulfate only A undergoes the necessary ring quatemization, giving rise to two isomers (ratio
尝试从 N-酰氨基/脲基四唑(A,B;1H-/2H-系统)中获取标题化合物。这些材料通过各自N-氨基四唑的酰化提供(A在一个步骤中,B部分通过直接获得的二酰化衍生物的水解)。在用过量的硫酸二甲酯处理时,只有 A 进行必要的环季铵化,产生两种异构体(比例约为 4:1);用碱进行后处理可以分离出主要的胺 (X)。该技术需要完全完成(缓慢的)季铵化过程,因为在 pH > 7 时,硫酸二甲酯会迅速影响 A 的侧链。结论实验涉及标题化合物 (X-XII) 的质子化和甲基化。