Les fluorations comparees des chloropyrimidines et de la chloro-s-triazine en milieu de fluorure de potassiun solide
作者:J. Hitzke
DOI:10.1016/s0022-1139(00)81784-4
日期:1981.4
The fluorinations of tetrachloropyrimidine, 2,4,6-trichloropyrimidine and trichloro-s-triazine were carried out in sealed tubes with KF in presence of inert gas and then compared. The fluorinated derivatives C4FxClyN2 with x + y = 4, 0⩽x<4 , C4HFxClyN2 with x + y = 3, 0⩽x⩽3 and C3FxClyN3 with x + y = 3, 0⩽x⩽3 were obtained. The influence of contact time, temperature and concentration of the ion F−
四氯嘧啶,2,4,6-三氯嘧啶和三氯-s-三嗪的氟化反应是在惰性气体存在下,在装有KF的密封管中进行的,然后进行比较。的氟化衍生物Ç 4 ˚F X氯ý Ñ 2与X + Y = 4,0⩽x<4,C 4 HF X氯ý Ñ 2与X + Y = 3,0⩽x⩽3和C 3 ˚F X氯y N 3,其中x + y = 3,得到0⩽x⩽3。离子的F的接触时间,温度和浓度的影响-进行了调查和比较;在我们的实验条件下,发现摩尔产率始终高于50%。我们与2、4和4、6-二氯嘧啶的氟化反应进行了比较。可以直接以良好的比例获得诸如5-氯三氟嘧啶,三氟嘧啶等的氟化衍生物。在高温下(400°C持续16 h),在KF存在下,四氯嘧啶产生热解和缩合产物,例如C 6 Cl 6和C 5 Cl 5 N的氟化衍生物:C 6 FCl 5,C 6 F 2 Cl 4 ···或C 5 FCl4 N,C 5 F 2 Cl 3 N