Synthesis of 2-arylbenzoxazoles via DDQ promoted oxidative cyclization of phenolic Schiff bases—a solution-phase strategy for library synthesis
作者:Junbiao Chang、Kang Zhao、Shifeng Pan
DOI:10.1016/s0040-4039(01)02302-4
日期:2002.2
The Schiff base derived from the condensation of o-aminophenol with benzaldehydes was induced to undergo oxidative cyclization in the presence of DDQ. The resulting 2-arylbenzoxazoles were separated from the reduced DDQ byproduct by treatment of reaction mixture with a strongly basic ion-exchange resin. The applicability of this chemistry to spatially separate library synthesis is demonstrated by the
在DDQ存在下,诱导衍生自邻氨基苯酚与苯甲醛缩合的席夫碱进行氧化环化反应。通过用强碱性离子交换树脂处理反应混合物,从还原的DDQ副产物中分离出所得的2-芳基苯并恶唑。通过制备352个成员的文库,证明了该化学方法在空间上分离文库合成的适用性。