A process for preparing alfuzosin or a salt thereof, which minimizes the concentration of an N
1
-(4-amino-6,7-dimethoxyquinazolin-2-yl)-N
1
-methyl-N
2
-(4-amino-6,7-dimethoxyquinazolin-2-yl)-propane-1,3-diamine impurity in the product.
一种制备奥法唑辛或其盐的方法,该方法可以最小化产品中N1-(
4-氨基-6,7-二甲氧基喹唑啉-2-基)-N1-甲基-N2-(
4-氨基-6,7-二甲氧基喹唑啉-2-基)-
丙烷-1,3-二胺杂质的浓度。