A process for producing sulfoxide derivatives or salts thereof in the amorphous state, characterized by heat-drying solvated crystals of a sulfoxide derivative or a salt thereof represented by the general formula (I): wherein R
1
represents a hydrogen atom, a methoxy group, or a difluoromethoxy group; R
2
represents a methyl group or a methoxy group; R
3
represents a 3-methoxypropoxy group, a methoxy group, or a 2,2,2-trifluoroethoxy group; R
4
represents a hydrogen atom or a methoxy group; and B represents a hydrogen atom, an alkali metal or ½ alkaline earth metal.
一种生产无定形状态的亚砜衍
生物或其盐的工艺,其特征在于加热干燥通式 (I) 所代表的亚砜衍
生物或其盐的溶解结晶: 其中 R
1
代表氢原子、甲氧基或二
氟甲氧基; R
2
代表甲基或甲氧基; R
3
代表 3-甲氧基丙氧基、甲氧基或 2,2,2-三
氟乙氧基; R
4
代表氢原子或甲氧基;以及 B 代表氢原子、碱
金属或 ½ 碱土
金属。