abstract |
The present invention relates to a process for preparing B-[(7α,17β)-17-hydroxy-7-[9-[(4,4,5,5,5-pentafluoropentyl)sulfinyl]estra-1,3,5(10)-trien-3-yl]-boronic acid, known as Fulvestrant-3-boronic acid or ZB716, whose structure is reported below: Formula (I) ZB716 |