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.
本发明旨在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,在不使用大量过量的
4-甲基哌啶的情况下,以更高的收率生产公式1化合物的方法。生产(2R,3R)-2-(2,4-二
氟苯基)-3-(4-甲基
亚胺基)-1-(
1H-1,2,4-三唑-1-基)丁-2-醇或其酸加成盐的方法包括在反应溶剂中,在碱
金属或碱土
金属的氢氧化物的存在下,与
4-甲基哌啶的酸加成盐反应,反应物为(2R,3S)-2-(2,4-二
氟苯基)-3-甲基-2-[(
1H-1,2,4-三唑-1-基)甲基]环氧烷。碱
金属或碱土
金属的氢氧化物可以选择自
锂,
钠,
钙和
锶的组中,或其
水合物。