Febuxostat can be prepared from the compound of the following formula (VI); Formula (VI) has been prepared in a one-pot process by combining a compound of the following formula (II); with an organic solvent, isobutyl halide and an inorganic base, to obtain a compound of the following formula (III); Formula III is optionally filtered before combining it with hydroxylamine base or hydroxylamine HCl. A water scavenger is added to obtain the compound of formula VI. Febuxostat can then be prepared, for example, by combining the compound of formula VI with one organic solvent and an alkali metal hydroxide.
非布索坦可以从以下公式(VI)的化合物制备;公式(VI)已经通过将以下公式(II)的化合物与有机溶剂、异丁基卤代烷和
无机碱一起进行一锅法过程而制备,以获得以下公式(III)的化合物;在将其与
羟胺碱基或
羟胺HCl结合之前,可以选择性地过滤公式III。 添加
水吸附剂以获得公式VI的化合物。 然后,例如,通过将公式VI的化合物与一个有机溶剂和碱
金属氢氧化物结合来制备
非布索坦。