The reaction of 2-fluoroalkyl-1-iodoethylenes with arylamines: a facile method for the synthesis of fluoroalkylated quinolines and enaminoketones
作者:Fulu Zhao、Xianjin Yang、Jintao Liu
DOI:10.1016/j.tet.2004.08.041
日期:2004.10
the subsequent acid promoted transformation of the products were described. In the presence of ZnCl2 and triethylamine, 1 reacted readily with various p-substituted anilines in HMPA under a vacuum of 60–70 mmHg to give the corresponding enaminoaldehydes (2) as a mixture of E- and Z-isomers. Cyclization of 2, without further purification in refluxing toluene, catalyzed by strong acids such as p-toluene
描述了2-氟烷基-1-碘乙烯与芳基胺(1)的反应以及随后的酸促进产物的转化。在ZnCl 2和三乙胺的存在下,1在HMPA中于60-70 mmHg的真空下容易与各种对位取代的苯胺反应,得到相应的烯胺醛(2),为E-和Z-异构体的混合物。在强酸(如对甲苯磺酸和三氟甲磺酸)的催化下,将2环化,无需在回流的甲苯中进一步纯化,即可得到2-氟烷基喹啉(3),虽然主要是当2在THF水溶液中用酸处理时获得了氟烷基化的氨基酮(4)。为形成3和4提出了一种可能的机制。