Used in organic synthesis as a key intermediate in Suzuki-Miyaura cross-coupling reactions, enabling the formation of carbon-carbon bonds for constructing complex indolinone derivatives. Valuable in pharmaceutical research for developing kinase inhibitors and other bioactive molecules due to the indolinone scaffold's prevalence in drug-like compounds. The boronate ester group allows for efficient and selective coupling with aryl or heteroaryl halides under mild palladium catalysis. Commonly employed in medicinal chemistry for library synthesis and structure-activity relationship studies.