由N-(5-苯基-1,2,4-恶二唑-3-基)甲亚胺酸乙酯合成1-取代的3-氨基-1 H -1,2,4-三唑
摘要:
已经开发了合成1-取代的3-氨基-1 H -1,2,4-三唑的通用且有效的方法。从N-(5-苯基-1,2,4-恶二唑-3-基)甲亚胺酸乙酯(1a)制备了所需的3-氨基-1 H -1,2,4-三唑(3),具有良好的收率。)和苯胺或胺(2)通过一锅法,包括形成甲酰胺并随后进行热单环重排。苯甲酰基保护基很容易通过硫酸促进的脱保护作用而除去。
Synthesis of 1-substituted 3-amino-1H-1,2,4-triazoles from ethyl N-(5-phenyl-1,2,4-oxadiazol-3-yl)formimidate
作者:Jeff Shen、Haiming Zhang
DOI:10.1016/j.tet.2015.06.094
日期:2015.9
efficient method for the synthesis of 1-substituted 3-amino-1H-1,2,4-triazoles has been developed. The desired 3-amino-1H-1,2,4-triazoles (3) were prepared in good to excellent yields from ethyl N-(5-phenyl-1,2,4-oxadiazol-3-yl)formimidate (1a) and anilines or amines (2) via a one-pot process involving formimidamide formation followed by a thermal monocyclic rearrangement. The benzoyl protecting group could
已经开发了合成1-取代的3-氨基-1 H -1,2,4-三唑的通用且有效的方法。从N-(5-苯基-1,2,4-恶二唑-3-基)甲亚胺酸乙酯(1a)制备了所需的3-氨基-1 H -1,2,4-三唑(3),具有良好的收率。)和苯胺或胺(2)通过一锅法,包括形成甲酰胺并随后进行热单环重排。苯甲酰基保护基很容易通过硫酸促进的脱保护作用而除去。