The present invention provides process for preparation of dihydroxy benzoquinoline compound (III) comprising reacting dihydroxy isoquinoline compound (IV) or a salt thereof with (2-acetyl-4-methyl-pentyl)-trimethyl-ammonium iodide (V) and further 5 converting it to tetrabenazine (I) and deutetrabenazine (II).
本发明提供了一种制备二羟基苯醌啉化合物(III)的方法,包括将二羟基
异喹啉化合物(IV)或其盐与(2-乙酰基-4-甲基戊基)-三甲基
铵碘(V)反应,并进一步将其转化为四苯嗪(I)和
氘代四苯嗪(II)的过程。