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 differentconditions with high yields. In this research, it was found that the p‐toluenesulfonic acid was an efficient catalyst for obtaining