A process for preparing a compound having PGD2 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.
一种制备具有
PGD2拮抗作用的化合物的方法,该化合物由式(I)表示,或其药学上可接受的盐或
水合物,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,使用卤代氧酸在
2,2,6,6-四甲基哌啶-1-氧自由基的存在下氧化产物,使用Wittig反应的条件下与叶立德反应的产物反应,可选择性地去保护产物。