These common heterocyclic compound, 106896-49-5, name is Methyl 4-amino-3-bromobenzoate, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route. Product Details of 106896-49-5
A flame-dried flask, equipped with a reflux condensor, containing methyl 4- amino-3-bromobenzoate (2.5 g, 10.87 mmol), bis(neopentyl glycolato)diboron (3.07 g, 13.58 mmol), potassium acetate (3.20 g, 32.6 mmol), and PdC^dppf -CH^C^ adduct(0.222 g, 0.272 mmol) was added degassed DMSO (31.0 mL). The resulting dark red- brown suspension was warmed to 85 C. After 2.5 h, the resulting dark black reaction was cooled to RT and poured into cold water (100 mL) to give a suspension. The suspension was extracted with EtOAc (3x). The combined organic layers were washed with sat. aHC03, brine, dried over sodium sulfate, filtered and concentrated to give a brown solid weighing 3.1 g. Purification by normal phase chromatography gave 1.64 g (55%) of Intermediate 39 as a pale, yellow solid. lH NMR (500 MHz, CDC13) delta ppm8.35 (d, J=2.20 Hz, 1 H), 7.84 (dd, J=8.53, 2.20 Hz, 1 H), 6.52 (d, J=8.53 Hz, 1 H), 5.25 (br. s., 2 H), 3.84 (s, 3 H), 3.79 (s, 4 H), 1.03 (s, 6 H). MS (ESI) m/z: 196.0 (M-C5H8+H)+
The synthetic route of Methyl 4-amino-3-bromobenzoate has been constantly updated, and we look forward to future research findings.
Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; CORTE, James, R.; FANG, Tianan; DECICCO, Carl, P.; PINTO, Donald, J., P.; ROSSI, Karen, A.; HU, Zilun; JEON, Yoon; QUAN, Mimi, L.; SMALLHEER, Joanne, M.; WANG, Yufeng; YANG, Wu; WO2011/100401; (2011); A1;,
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