The important role of 2-Bromo-5-methylaniline

Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 53078-85-6, name is 2-Bromo-5-methylaniline, A new synthetic method of this compound is introduced below., Application In Synthesis of 2-Bromo-5-methylaniline

A mixture of compound 36b (3 3 g, 17 7 mmol), glycerin (3 3 g, 35 5 mmol), nitrobenzene (2 2 g, 17 7 mmol) and 75% aqueous sulfuric acid (10 mL, 138 mmol) is stirred at 15O0C for 3 h (mixture turns black and viscous) The reaction mixture is cooled down, poured into ice-water (200 mL) and 10 N aqueous NaOH is added (30 mL, 300 mmol) The black mixture is then shaken with EtOAc (100 mL) and is centrifuged in 50 mL portions The upper EtOAc layers are combined and the bottom aqueous layers containing the black tar are shaken with EtOAc and re-cent?fuged All EtOAc extracts are combined, washed with brine, dried over Na2SO4, filtered and concentrated under vacuum to give 4.8 g of a brown-red oil. This material is chromatographed on 80 g silica gel column (CombiFlash Companion apparatus, hexanes/EtOAc gradient). The fractions containing the compound are concentrated under vacuum to afford compound 36c as a white solid (3.26 g, 83% yield).

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Patent; BOEHRINGER INGELHEIM INTERNATIONAL GmbH; CARSON, Rebekah J.; FADER, Lee; KAWAI, Stephen; LANDRY, Serge; WO2009/62288; (2009); A1;,
Bromide – Wikipedia,
bromide – Wiktionary