A Simple Transformation of 1‐(Isoxazol‐3‐yl)ureas to 5‐(2‐oxoalkyl)‐2,4‐dihydro‐3H‐1,2,4‐triazol‐3‐ones through Base‐Promoted Boulton‐Katritzky Rearrangement
作者:Jisheng Liu、Chen Chen、Rajendraprasad Kotagiri、Wenqiang Yang、Qian Cai
DOI:10.1002/adsc.201801357
日期:2019.2
2,4‐Dihydro‐3H‐1,2,4‐triazol‐3‐ones are a class of biologically important heterocycles. A novel and simple synthesis of such structures is developed. The method is through a base‐promoted Boulton‐Katritzky‐type rearrangement of 1‐(isoxazol‐3‐yl)ureas and is highly efficient for the formation of 2,4‐dihydro‐3H‐1,2,4‐triazol‐3‐ones.
2,4-二氢-3H -1,2,4-三唑-3-酮是一类重要的生物杂环。开发了这种结构的新颖和简单的合成。该方法是通过碱促进的1-(异恶唑-3-基)脲的Boulton-Katritzky型重排而形成的,对于形成2,4-二氢-3H -3,1,2,4-三唑-3的形成非常有效-那些。