5-bromo-2,4-dimethoxy-3-methylphenol Chemical Properties

Boiling point:

320.7±37.0 °C(Predicted)

Density 

1.467±0.06 g/cm3(Predicted)

pka

9.63±0.28(Predicted)

5-bromo-2,4-dimethoxy-3-methylphenol Usage And Synthesis

Synthesis

The synthesis of 5-bromo-2,4-dimethoxy-3-methylphenol typically begins with 2-methylresorcinol and proceeds through multiple steps. A typical synthetic route involves the following key steps: First, 2-methylresorcinol undergoes O-methylation to yield the precursor of 2,4-dimethoxy-3-methylphenol, usually its dimethyl ether or partially methylated product. Subsequently, an electrophilic substitution reaction, i.e., bromination, occurs on the benzene ring. Since the two methoxy groups and one hydroxyl group (or another methoxy group) on the benzene ring are strong activating groups, they guide the bromine atom to substitute to the para or ortho position on the benzene ring, where the activation level is highest. By controlling the reaction conditions and selecting a suitable brominating reagent (such as N-bromosuccinimide NBS), the bromine atom can be selectively substituted to the 5-position, ultimately yielding the target product, 5-bromo-2,4-dimethoxy-3-methylphenol.