One-flask synthesis of pyrazolone thioethers involving catalyzed and uncatalyzed thioetherification pathways of pyrazolones
作者:Prasun Mukherjee、Asish R. Das
DOI:10.1039/c7ob01754e
日期:——
A one-flask thioetherification of pyrazolones has been demonstrated by transforming several pyrazolones to their corresponding 4-mercaptopyrazolone derivatives and employing them towards cross-coupling with various aromatic and heteroaromatic iodides by applying Pd(OAc)2/xantphos as the catalytic system. The coupling ability of these thiol intermediates with 2,3-dichloropyrazine through an aromatic
通过将几种吡唑酮转化为其相应的4-巯基吡唑酮衍生物,并通过将Pd(OAc)2 / xantphos用作催化体系,将其用于与各种芳族和杂芳族碘化物交叉偶联,证明了吡唑啉酮的单烧瓶硫醚化作用。通过芳族S采用2,3-二氯吡嗪这些硫醇中间体的耦合能力Ñ 2途径也已建立。该方法提供了廉价的起始原料的使用以及较短的反应时间。