An Efficient and Facile Synthesis of 5-(Thiophene-2-carbonyl)-6-(trifluoromethyl)-tetrahydro-pyrimidin-2(1<i>H</i>)-one and 6-(Thiophen-2-yl)-4,5-dihydropyrimidin-2(1<i>H</i>)-one from Same Substrates Under Different Conditions
作者:Rong Liang-Ce、Yunyun Zha、Sheng Xia、Linlin Ji、Jing Zhang、Peijun Cai
DOI:10.1002/jhet.2299
日期:2016.1
5‐(thiophene‐2‐carbonyl)‐6‐(trifluoromethyl)‐tetrahydropyrimidin‐2(1H)‐one and 6‐(thiophen‐2‐yl)‐4,5‐dihydropyrimidin‐2(1H)‐one derivatives have been synthesized from the reactions of aromatic aldehydes, 4,4,4‐trifluoro‐1‐(thien‐2‐yl)butane‐1,3‐dione and urea under the different conditions with high yields. In this research, it was found that the p‐toluenesulfonic acid was an efficient catalyst for obtaining
一系列5-(噻吩-2-羰基)-6-(三氟甲基)-四氢嘧啶-2(1 H)-一和6-(噻吩-2-基)-4,5-二氢嘧啶-2(1 H)在不同条件下,芳族醛,4,4,4-三氟-1-(噻吩-2-基)丁烷-1,3-二酮与尿素的反应合成了一种衍生物,收率很高。在这项研究中,发现对甲苯磺酸是获得5-(噻吩-2-羰基)-6(三氟甲基)四氢嘧啶-2(1 H)-一衍生物的有效催化剂。同时,无溶剂和NaOH是合成6-(噻吩-2-基)-4,5-二氢嘧啶-2(1 H)-一阶导数 此外,由于反应时间短,产率高,设置简单,这项研究为制备这类化合物提供了一种有效的方法。