Methanol → 2-Methyl-1-propyl-1,3-benzodiazole-5-carboxylic acid

Beteiligte Stoffe

Reaktionsschritte

To a methanol (17 mL) solution of 3-amino-4-n-propylaminobenzoic acid (see Working Example 82-2) (1.68 g, 8.65 mmol) was added methyl acetimidate hydrochloride (1.14 g, 10.4 mmol), and this was heated to reflux for 4 hours. After the reaction was complete, this was cooled to room temperature, diethyl ether was added, and this was allowed to stand at room temperature for 10 minutes. The crystals obtained were filtered, and after being washed with diethyl ether, they were dried to yield the title compound (2.20 g, quant.).

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