Reference of 110407-59-5, These common heterocyclic compound, 110407-59-5, name is 2-Chloro-4-fluorobromobenzene, 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.
Step E: Preparation of 4-chloro-a-(2-chloro-4-fluorophenyl)-l-(2,6-difluorophenyl)- lH-imidazole-5 -methanol; To a mixture of l-bromo-2-chloro-4-fluorobenzene (0.12 mL, 0.99 mmol) in tetrahydrofuran (5 mL) at about -78 C was added dropwise over 5 minutes n-butyllithium (2.5 M in hexanes, 0.37 mL, 0.94 mmol) while maintaining the temperature of the reaction mixture below -65 C. After the addition was complete, 4-chloro-l-(2,6-difluorophenyl)- lH-imidazole-5-carboxaldehyde (i.e. the product of Step D) in tetrahydrofuran (2 mL) was added dropwise to the reaction mixture while maintaining the reaction mixture at about -62 to -65 C. After 20 minutes, saturated aqueous ammonium chloride solution (5 mL) was added in one portion to the reaction mixture, the mixture was allowed to warm to ambient temperature (about 20 C), and then water (1 mL) was added. The resulting mixture was poured onto a solid phase extraction tube (Varian Chem Elute, prepacked with diatomaceous) and eluted with ethyl acetate (50 mL). The ethyl acetate eluant was concentrated under reduced pressure and the resulting material was triturated with ethyl acetate -hexanes to provide a solid. The solid was recrystallized from ethyl acetate-hexanes to provide the title compound, a compound of the present invention, as a solid (0.080 g). in NMR (DMSO- ): delta 7.71 (m, 1H), 7.45-7.35 (m, 4 H), 7.20 (m, 1H), 6.68 (m, 1H), 6.24 (br s, 1H), 5.71 (s, 1H).
Statistics shows that 2-Chloro-4-fluorobromobenzene is playing an increasingly important role. we look forward to future research findings about 110407-59-5.
Reference:
Patent; E. I. DU PONT DE NEMOURS AND COMPANY; LONG, Jeffrey, Keith; BEREZNAK, James, Francis; KAR, Moumita; TAGGI, Andrew, Edmund; CHEN, Yuzhong; WO2012/44650; (2012); A1;,
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