反应详情

A mixture of 1.11 g (6.27 mmol) of 3-azido-4-methyl benzoic acid (Compound 2) and 1.12 mL (12.5 mmol) of methyl propiolate, was stirred in 4.2 mL of DMA at 110° C. in a sealed tube overnight. The resulting brown solution was poured into water, and the resulting precipitate was filtered, and then recrystallized from EtOH/water to provide 1.02 g (62.3%) of 1-(5-carboxy-2-methyl-phenyl)-1H-1,2,3-triazole-4-carboxylic acid methyl ester as tan crystals. ESI MS (m/z 262, 100, M+1)

1. filtrationthe resulting precipitate was filtered
2. customrecrystallized from EtOH/water