(R)-1-(pyridin-3-yl)-2-amino-ethanol dihydrochloride 、
6-{4-[4-(3-Cyclopentyl-propyl)-5-oxo-4,5-dihydro-tetrazol-1-yl]-phenylsulfamoyl}-chroman-(S)-2-carboxylic acid 在
(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 、
三乙胺 作用下,
以
二氯甲烷 为溶剂,
以92%的产率得到6-{4-[4-(3-cyclopentyl-propyl)-5-oxo-4,5-dihydro-tetrazol-1-yl]-phenylsulfamoyl}-chroman-(2S)-carboxylic acid [(2R)-hydroxy-2-pyridin-3-yl-ethyl]-amine