A process for preparing a compound having PGD
2
antagonism represented by the formula (I), or a pharmaceutically acceptable salt or hydrate thereof, which process comprises reacting an amino alcohol of the formula (II) or its salt with a compound of the formula (III) or its reactive derivative, oxidizing the product with halo oxoacid in the presence of 2,2,6,6-tetramethylpiperidine-1-oxyls, reacting the product with an ylide under the conditions for Wittig reaction, and optionally deprotecting the product.
1
一种制备具有
PGD2拮抗作用的化合物(I)或其药学上可接受的盐或
水合物的方法,该方法包括将式(II)的
氨基醇或其盐与式(III)的化合物或其反应衍
生物反应,以
2,2,6,6-四甲基哌啶-1-氧自由基的存在下,用卤代氧酸氧化产物,将产物在Wittig反应条件下与叶立德反应,然后可选择性去保护产物。