Electric Literature of 478375-40-5,Some common heterocyclic compound, 478375-40-5, name is Methyl 3-bromo-5-methylbenzoate, molecular formula is C9H9BrO2, 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.
Azobisisobutyronitrile (1.79 g) was added to methyl3-bromo-5-methylbenzoate (50 g)10 and N-bromosuccinimide (44.7 g) in 350 mL acetonitrile, and the mixture was refluxed overnight.An additional II g of N-bromosuccinimide and 0.5 g of azobisisobutyronitrile was added, and therefluxing was continued for 3 hours. The mixture was concentrated, taken up in 500 mL diethylether, and stirred for 30 minutes. The mixture was filtered, and the resulting solution wasconcentrated. The crude product was chromatographed on silica gel using 10% ethyl acetate in15 heptanes to give the title compound
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route Methyl 3-bromo-5-methylbenzoate, its application will become more common.
Reference:
Patent; ABBVIE INC.; BOGHAERT, Erwin, R.; SOUERS, Andrew, J.; PHILLIPS, Andrew, C.; JUDD, Andrew, S.; BRUNCKO, Milan; (717 pag.)WO2017/214282; (2017); A1;,
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