An object is to provide a process for producing the compound of formula 1 in higher yield by the ring-opening addition reaction of epoxytriazole with amine under mild conditions without using a large excess of 4-methylenepiperidine. The process for producing (2R,3R)-2-(2,4-difluorophenyl)-3-(4-methylenepiperidin-1-yl)-1-(1H-1,2,4-triazol-1-yl)butan-2-ol or an acid addition salt thereof comprises reacting (2R,3S)-2-(2,4-difluorophenyl)-3-methyl-2-[(1H-1,2,4-triazol-1-yl)methyl]oxirane with an acid addition salt of 4-methylenepiperidine in a reaction solvent in the presence of a hydroxide of an alkali metal or an alkaline earth metal selected from the group consisting of lithium, sodium, calcium, and strontium, or a hydrate thereof.
目的是提供一种在温和条件下,通过环
氧三唑与胺的开环加成反应,而不使用大量过量的
4-亚甲基哌啶,以较高产率生产式 1 化合物的工艺。生产(2R,3R)-2-(
2,4-二
氟苯基)-3-(
4-亚甲基哌啶-1-基)-1-(
1H-1,2,4-三唑-1-基)丁-2-醇或其酸加成盐的工艺包括将(2R,3S)-2-(
2,4-二
氟苯基)-3-
甲基-2-[(1H-1,2、(2R,3S)-2-(
2,4-二
氟苯基)-3-
甲基-2-[(1H-1,2, 4-三唑-1-基)
甲基]
环氧乙烷与
4-亚甲基哌啶的酸加成盐在反应溶剂中,在选自
锂、
钠、
钙和
锶组成的碱
金属或碱土
金属的
氢氧化物或其
水合物存在下反应。