Synthesis and Mechanistic Study of Cyclic Oxoguanidines via Zn(OTf)<sub>2</sub>-Catalyzed Guanylation/Amidation from Readily Available Amino Acid Esters and Carbodiimides
作者:Yue Chi、Ling Xu、Shanshan Du、Haihan Yan、Wen-Xiong Zhang、Zhenfeng Xi
DOI:10.1002/chem.201500573
日期:2015.7.13
The Zn(OTf)2‐catalyzed guanylation/amidationfromreadilyavailableaminoacidesters and carbodiimides is achieved to provide efficiently various cyclicoxoguanidines, including 2‐amino‐1H‐imidazol‐5(4H)‐ones and 2‐aminoquinazolin‐4(3H)‐ones in medium‐to‐high yields. It is the first time that an ammonium salt has been used in a guanylation reaction. The application of cyclicoxoguanidines to provide