4-(4,4,5,5-Tetramethyl-1,3,2-dioxaboran-2yl)aniline is a heterocyclic building block.^1,2It has been used in the synthesis of 3-aminoindazole-based multi-targeted receptor tyrosine kinase (RTK) inhibitors with anticancer activity and roscovitine derivatives that are dual inhibitors of cyclin-dependent kinases (CDKs) and casein kinase 1 (CK1).

1.Dai, Y., Hartandi, K., Ji, Z., et al.Discovery of N-(4-(3-amino-1H-indazol-4-yl)phenyl)-N'-(2-fluoro-5-methylphenyl)urea (ABT-869), a 3-aminoindazole-based orally active multitargeted receptor tyrosine kinase inhibitorJ. Med. Chem.50(7)1584-1597(2007) 2.Paraiso, K.H.T., Haarberg, H.E., Wood, E., et al.The HSP90 inhibitor XL888 overcomes BRAF inhibitor resistance mediated through diverse mechanismsClin. Cancer Res.18(9)2502-2514(2012)