is achieved solely by the application of microwave-assisted chemistry, without any need of activating agents or protecting group manipulations. The product formation of various substituted guanidines from the corresponding isothiouronium salts was controlled by the nucleophilicity of the counterion and influenced by the reaction temperature. Further, a new fast-track access to tetrahydropyrimidin-2-ylamines
在这项研究中提出了一种快速,简单的方法来新颖的环状异
硫脲和相关的
胍衍
生物。仅通过微波辅助
化学的应用即可完成中央碱性支架的构建,而无需任何活化剂或保护基团的操作。由相应的异
硫脲鎓盐形成的各种取代的
胍的产物形成受抗衡离子的亲核性控制,并受反应温度的影响。此外,开发了对四氢
嘧啶-2-基胺的新的快速通道。