(3-CHLORO-4-METHOXYCARBONYL)BENZENEBORONIC ACID Chemical Properties

Melting point:

174-178

storage temp. 

Inert atmosphere,2-8°C

solubility 

soluble in Methanol

form 

powder to crystal

color 

White to Almost white

Safety Information

Hazard Codes 

Xi

Hazard Note 

Irritant

HS Code 

2931900090

(3-CHLORO-4-METHOXYCARBONYL)BENZENEBORONIC ACID Usage And Synthesis

Uses

3-Chloro-4-methoxycarbonylphenylboronic acid

Synthesis

To a solution of methyl 2-chloro-4-bromobenzoate (31.4 mmol) in dioxane (154 mL) was added pinacol ester of bis(boronic acid) (8.6 g, 31.4 mmol), PdCl2(PPh3)2 (0.42 mmol), and KOAc (94.2 mmol), and the mixture was stirred for 2-6 hr at 100 ??C under nitrogen. The mixture was diluted with EtOAc and water. The organic layer was separated, washed with brine, dried over MgSO4 and evaporated. The residue was purified by silica gel column chromatography (hexane/EtOAc 5/1) to give 3-chloro-4-methoxycarbonylphenylboronic acid pinacol ester. To a suspension of the above product (29.4 mmol) in acetone (175 mL) and water (175 mL) was added NH4OAc (66.2 mmol) and NaIO4 (14.2 g, 66.4 mmol) and the mixture was stirred for 15 hours at room temperature. The solvent was evaporated and the residue was diluted with EtOAc. The organic layer was separated, washed with water and brine, dried over MgSO4 and evaporated under reduced pressure to give the title compound as a white solid.

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