Studies in fluorinated 1,3-diketones and related compounds. Part XVII. Synthesis and spectroscopic studies of some new 5-alkyl-3-fluoroaryl-1-pentafluoroaryl-pyrazoles and 2-amino-6-alkyl(perfluoroalkyl)-4-aryl pyrimidines
作者:Vineeta Sareen、Sunita Jain
DOI:10.1016/s0022-1139(00)80570-9
日期:1993.8
Six new 3-(4′-fluorophenyl)-1,5-trisubstituted pyrazoles have been synthesized from the appropriate fluorinated 1,3-diketones and pentafluorophenylhydrazine in the presence of absolute ethanol and hydrochloric acid, viz., 1-pentafluorophenyl-3-(4′-fluorophenyl)-5- methylpyrazole, 1-pentafluorophenyl-3-(4′-fluorophenyl)-5-trifluoromethylpyrazole, 5- ethyl-1-pentafluorophenyl-3-(4′-fluorophenyl) pyrazole
在无水乙醇和盐酸存在下,由适当的氟化1,3-二酮和五氟苯基肼合成了六种新的3-(4'-氟苯基)-1,5-三取代的吡唑,即1-五氟苯基-3- (4'-氟苯基)-5-甲基吡唑,1-五氟苯基-3-(4'-氟苯基)-5-三氟甲基吡唑,5-乙基-1-五氟苯基-3-(4'-氟苯基)吡唑,5-(五氟乙基) )-1-五氟苯基-3-(4'-氟苯基)吡唑,1-五氟苯基-3-(4'-氟苯基)5-正丙基吡唑和5-(七氟丙基)-1-五氟苯基-3-(4'-氟苯基)吡唑。此外,在盐酸存在下,以无水乙醇为溶剂,由相同的二酮和碳酸胍制备了六种新的2-氨基-4-(4'-氟苯基)-6-烷基(全氟烷基)-三取代的嘧啶,即 2-氨基-4(4'-氟苯基)-6-甲基嘧啶,2-氨基-4(4'-氟苯基)-6-三氟甲基嘧啶,2-氨基-6-乙基-4(4'-氟苯基)嘧啶,2 -氨基-6-五氟乙基-4-(4'-氟苯基)嘧啶,2-氨基-4-(4'-