A process for preparation of imiquimod comprising oxidation of 1-Isobutyl-1H-imidazo quinoline quinoline (II) afforded 1-Isobutyl-1H-imidazo-[4,5-c]-quinoline-5-N-oxide (III) which is isolated in pure form as its hydrochloride salt (IV) followed by conversion to 4-chloro derivative (V) and conversion to corresponding 4-iodo derivative (VI) which is a new intermediate. This new intermediate is convened to imiquimod (VIII) and purified via its novel maleate salt.
制备伊米曲莫德的方法包括将1-异丁基-
1H-咪唑喹啉喹啉(II)氧化,得到1-异丁基-
1H-咪唑-[4,5-c]-
喹啉-5-N-氧化物(III),该化合物以其盐酸盐(IV)的纯形式分离,然后转化为4-
氯衍
生物(V),再转化为相应的4-
碘衍
生物(VI),这是一种新的中间体。该新中间体被转化为伊米曲莫德(VIII),并通过其新型
马来酸盐进行纯化。