The trisodium salt of ibandronate of formula (I):
A process of preparing said salt comprises:
a) mixing 3-(methylpentylamino)propionic acid hydrochloride, phosphorous acid (in a 2.5-3.5 molar excess with respect to 3-(methylpentylamino)propionic acid hydrochloride), sunflower oil (in an amount of 6-9 volume parts for 1 weight part of 3-(methylpentylamino)propionic acid hydrochloride) and phosphorus trichloride (in a 3-4 molar excess with respect to 3-(methylpentylamino)propionic acid hydrochloride);
b) adding water (in an amount of 6-9 volume parts for 1 weight part of 3-(methylpentylamino)propionic acid hydrochloride) and after separation of the phases;
c) adjusting pH of the water phase to pH 12.5;
d) adding a water-miscible co-solvent and cooling down to precipitate the product or evaporate to dryness.
Another process for preparing the trisodium salt of ibandronate comprises admixing the monosodium salt of ibandronate or ibandronic acid or their solvates with water or a mixture water/sodium hydroxide and adjustment of pH to 12.5.
Various crystalline, semicrystalline and amorphous forms of trisodium ibandronate are disclosed.
伊班德罗酸的三钠盐的
化学式(I):制备该盐的过程包括:a)混合3-(甲基戊基
氨基)
丙酸盐酸盐、
磷酸(相对于3-(甲基戊基
氨基)
丙酸盐酸盐过量2.5-3.5摩尔)、葵花籽油(相对于3-(甲基戊基
氨基)
丙酸盐酸盐1重量部6-9体积部)和
三氯化磷(相对于3-(甲基戊基
氨基)
丙酸盐酸盐过量3-4摩尔);b)加入
水(相对于3-(甲基戊基
氨基)
丙酸盐酸盐1重量部6-9体积部)并分离相;c)调节
水相的pH至12.5;d)加入
水溶性共溶剂并冷却以沉淀产物或蒸发至干燥。另一种制备伊班德罗酸的三钠盐的方法包括将伊班德罗酸的单钠盐或伊班德罗酸或它们的溶剂与
水或
水/
氢氧化钠混合并将pH调节至12.5。公开了三
钠伊班德罗酸的各种结晶、半晶体和非晶形式。