4-Amino-5-chloro-2-methoxybenzoic acid → Methyl 4-amino-5-chloro-2-methoxybenzoate

Beteiligte Stoffe

Reaktionsschritte

To a solution of 4-amino-5-chloro-2-methoxybenzoic acid (1.008 g, 5.0 mmol) in a mixture of toluene (9 mL) and methanol (1 mL) at 0° C. was added (trimethylsilyl)diazomethane (2.0 M in hexane, 3.0 mL, 6.0 mmol) dropwise. The reaction mixture was then warmed to room temperature and stirred for 16 h. Excess (trimethylsilyl)diazomethane was quenched by adding acetic acid until the bright yellow color of the reaction mixture disappeared. The mixture was then concentrated in vacuo to give the title compound as an off-white solid, which was used without further purification.

Herkunft & Nachweise