The Base-Promoted Annulation of 2-Hydrazinyl Pyridine and CO<sub>2</sub>
toward Triazolones
作者:Xiaopeng Wu、Song Sun、Bingbing Wang、Jiang Cheng
DOI:10.1002/adsc.201700869
日期:2017.11.10
A base‐promoted annulation of 2‐hydrazinyl pyridine and atmospheric pressure of CO2 has been developed in the presence of silane as reducing reagent, affording a series of triazolones in moderate to excellent yields. CO2 served as a carbonyl source in this transfomation. Moreover, benzamidrazones also worked well under this procedure. Thus, it represents a green, sustainable and straightforward pathway
在硅烷作为还原剂存在下,开发了碱促进的2-肼基吡啶环化反应和大气压下的CO 2,可提供中等至极好的收率的三唑酮系列。在这种转化过程中,CO 2用作羰基来源。此外,苯并dra唑酮在该程序下也能很好地工作。因此,它代表了访问三唑酮框架的绿色,可持续和直接途径。