A straightforward preparation of fluorine-containing 1,2-dihydropyrimidines and pyrimidines with 2,2-dihydropolyfluoroalkylaldehydes
作者:Xian-Jin Yang、Li-Si Zhang、Jin-Tao Liu
DOI:10.1016/j.tet.2007.04.010
日期:2007.6
The reactions of 2,2-dihydropolyfluoroalkylaldehydes with ammonia and enol ethers or carbonyl compounds are described. In the presence of zinc chloride, all reactions took place readily in THF at 50 °C to give fluorine-containing 1,2-dihydropyrimidines in moderate to good yields. Dehydrogenation of the resulting fluorine-containing 1,2-dihydropyrimidines with tetrachloro-1,4-benzoquinone (TCBQ) or
描述了2,2-二氢多氟烷基醛与氨和烯醇醚或羰基化合物的反应。在氯化锌的存在下,所有反应都容易在50°C的THF中进行,以中等至良好的收率得到含氟的1,2-二氢嘧啶。在室温下用四氯-1,4-苯醌(TCBQ)或2,3-二氯-5,6-二氰基-1,4-苯醌(DDQ)对所得的含氟1,2-二氢嘧啶进行脱氢,得到相应的含氟嘧啶的收率很好。