A new synthetic route of 5-Bromobenzo[c][1,2,5]oxadiazole

According to the analysis of related databases, 51376-06-8, the application of this compound in the production field has become more and more popular.

Application of 51376-06-8, In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 51376-06-8 as follows.

Triethylamine (0.12 g), 5-bromo-2,1,3-benzoxadiazole (0.19 g) and dichlorobistriphenylphosphine palladium(II) (0.13 g) were added to a solution of N-({(5S)- 3 – [3 , 5 -difluoro-4-(trimethylstannyl)phenyl] -2-oxo- 1 ,3 -oxazolidin-5 -yl } methyl)acetamide (0.21 g) (which can be prepared according to Example 8 of WO 01/94342, at page 52) in dry dimethyl formamide (15 mL) and the reaction mixture was heated at 100 C for about 3 hours. The reaction mixture was filtered and diluted with ethyl acetate. The organic layer was washed with water, dried over sodium sulfate and concentrated. The crude EPO product was purified by column chromatography using 2 % methanol in dichloromethane as eluent to yield the title compound (0.035 g).Melting point: 165-168 C; EMS (m/z): 388;1HNMR(CDC13): delta 7.92 (m, 2H), 7.48 (dd, 1H), 7.32 (dd, 2H), 5.98 (t, 1H), 4.85 (m, 1H), 4.09 (t, 1H), 3.84 (m, 1H), 3.72 (m, 2H), 2.03 (s, 3H).

According to the analysis of related databases, 51376-06-8, the application of this compound in the production field has become more and more popular.

Reference:
Patent; RANBAXY LABORATORIES LIMITED; WO2006/35283; (2006); A1;,
Bromide – Wikipedia,
bromide – Wiktionary