Green synthesis of nitroaryl thioureas: Towards an improved preparation of guanidinium DNA binders
作者:Marco Minneci、Matas Misevicius、Isabel Rozas
DOI:10.1016/j.bmcl.2023.129346
日期:2023.6
nitro N,N′-diaryl thioureas via a one-pot method using cyrene as a solvent with almost quantitative yields. This confirmed the viability of cyrene as a green alternative to THF in the synthesis of thiourea derivatives. After screening different reducing conditions, the nitro N,N′-diaryl thioureas were selectively reduced using Zn dust in the presence of water and acid to the corresponding amino N,N′-diaryl
我们提出了一种通用的高效绿色方法,通过一锅法使用环烯作为溶剂制备硝基N,N'-二芳基硫脲,几乎可以定量收率。这证实了在硫脲衍生物的合成中,cyrene 作为 THF 的绿色替代品的可行性。在筛选不同的还原条件后,在水和酸存在下,使用锌粉选择性地将硝基N,N'-二芳基硫脲还原为相应的氨基N,N'-二芳基硫脲。然后将这些用于测试 Boc 保护的胍基与N,N的安装'-bis-Boc 保护的 pyrazole-1-carboxamidine 作为胍基化试剂不需要汞 (II) 活化。最后,对两种样品化合物的 Boc 脱保护后获得的 TFA 盐进行了测试,以确定它们对 DNA 的亲和力,表明没有结合。