913835-68-4

[1-(tert-Butyldimethylsilyl)-1H-indol-5-yl]boronic Acid is used in preparation of 1H-Pyrazolo[3,4-d]pyrimidine, 7H-Pyrrolo[2,3-d]pyrimidine, and Pyrrolo[2,1-f][1,2,4]triazine derivatives which are selective Brk kinase inhibitors for prevention or treatment of cancers.