The present application relates to a novel and improved process for preparing 5-(hydroxyalkyl)-1-phenyl-1,2,4-triazole derivatives of the formula (I) in which R1A and R1B are independently selected from the group consisting of hydrogen, fluorine, chlorine, methyl, monofluoromethyl, difluoromethyl, trifluoromethyl, ethyl, methoxy, difluoromethoxy and trifluoromethoxy, to novel precursors for preparation thereof, and to the preparation and use of the crystalline polymorph I of (5-(4-chlorophenyl)-2-({1-(3-chlorophenyl)-5-[(1S)-1-hydroxyethyl]-1H-1,2,4-triazol-3-yl}methyl)-4-[(2S)-3,3,3-trifluoro-2-hydroxypropyl]-2,4-dihydro-3H-1,2,4-triazol-3-one of the formula (I-A-1).本申請案關於一種用於製備式(I)之5-(羥基烷基)-1-苯基-1,2,4-三唑衍生物的新穎改良方法其中R1A和R1B獨立地選自由下列所構成的群組：氫、氟、氯、甲基、單氟甲基、二氟甲基、三氟甲基、乙基、甲氧基、二氟甲氧基和三氟甲氧基，關於用於製備該衍生物的新穎前驅物，以及關於式(I-A-1)之(5-(4-氯苯基)-2-({1-(3-氯苯基)-5-[(1S)-1-羥基乙基]-1H-1,2,4-三唑-3-基}甲基)-4-[(2S)-3,3,3-三氟-2-羥基丙基]-2,4-二氫-3H-1,2,4-三唑-3-酮的晶質多形物I的製備和用途。
