Synthesis
General procedure for the synthesis of methyl 2-bromo-4-bromomethylbenzoate from methyl 2-bromo-4-methylbenzoate: the reaction mixture was placed in a controlled microwave synthesizer of the model Biotage Initiator + SP Wave (power range 0-200 W, frequency 2.45 GHz, 60 W capped at steady state) and heated to 120 °C at 1 bar pressure for for several minutes. Upon completion of the reaction, the target product was isolated and purified by column chromatography using ethyl acetate-hexane gradient elution.
References
[1] Synlett, 2014, vol. 25, # 17, p. 2485 - 2487
[2] Patent: WO2016/89062, 2016, A2. Location in patent: Page/Page column 38; 39
[3] Patent: US2005/70584, 2005, A1. Location in patent: Page/Page column 24
[4] Patent: WO2008/124575, 2008, A1. Location in patent: Page/Page column 144
[5] Patent: WO2017/156165, 2017, A1. Location in patent: Paragraph 00504; 00505
