Synthetic Route of 823-57-4,Some common heterocyclic compound, 823-57-4, name is 2-Bromo-5-chloroaniline, molecular formula is C6H5BrClN, 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 B;. A solution of sodium nitrite (0.63 g, 9.2 mmol) and H2O (1.9 mL) was added dropwise at 0¡ã C. to a solution of 2-bromo-5-chlorobenzenamine (1.6 g, 7.7 mmol) in 12N HCl (18.2 mL) and TFA (2.31 mL). The reaction mixture was stirred at 0¡ã C. for 1 h followed by the dropwise addition of a solution of tin(II)chloride (3.1 g, 16.9 mmol) in 12N HCl (4.6 mL) and H2O (0.6 mL) at 0¡ã C. The reaction mixture stirred for 1 5 h at 20¡ã C. and was filtered and placed under vacuum to give 1 -(2-bromo-5-chlorophenyl)hydrazine hydrochloride (2.0 g, 7.8 mmol).
The synthetic route of 823-57-4 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Bristol-Myers Squibb Company; US2007/27178; (2007); A1;,
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics