The invention relates to a novel process for the preparation of an aminoalcohol of the formula
1
racemically or optically active, starting from 2-azabi-cyclo[2.2.1]hept-5-en-3-one, its further conversion to give the corresponding acyl derivative and its further conversion to (1S,4R)- or (1R,4S)-4-(2-amino-6-chloro-9-H-purine-9-yl)-2-cyclopentenyl-1-methanol of the formulae
2
In the latter synthesis, the aminoalcohol is converted into the corresponding D- or L-tartrate, which is then reacted with N-(2-amino-4,6-dichloropyrimidin-5-yl) formamide of the formula
3
to give (1S,4R)- or (1R,4S)-4-[(2-amino-6-chloro-5-formamido-4-pyrimidinyl)amino]-2-cyclopentenyl-1-methanol of the formulae
4
and then cyclized to give the end compounds.
该发明涉及一种新颖的方法,用于制备公式1的
氨基醇,其为外消旋或光学活性,从2-azabi-cyclo[2.2.1]hept-5-en-3-one出发,进一步转化为相应的酰基衍
生物,再进一步转化为公式2中的(1S,4R)-或(1R,4S)-4-(2-
氨基-6-
氯-9-H-
嘌呤-9-基)-2-
环戊烯基-1-
甲醇。在后一合成中,
氨基醇转化为相应的D-或
L-酒石酸盐,然后与公式3中的N-(2-
氨基-4,6-二
氯嘧啶-5-基)甲酰胺反应,以得到公式4中的(1S,4R)-或(1R,4S)-4-(2-
氨基-6-
氯-5-甲酰胺基-4-
嘧啶基)
氨基-2-
环戊烯基-1-
甲醇,然后进行环化反应以得到最终的化合物。