Water → Methyl 2-cyclopropyl-5-methyl-7-[(2,3,6-trifluorobenzyl)oxy]pyrazolo[1,5-a]pyridine-3-carboxylate

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Reaction Steps

1.45 g (3.00 mmol, purity 98%) of 1-amino-4-methyl-2-[(2,3,6-trifluorobenzyl)oxy]pyridinium 2,4,6-trimethylbenzenesulphonate from Example 155A were dissolved in 9.7 ml of DMF and admixed with 670 mg (5.40 mmol) of methyl 3-cyclopropylprop-2-ynoate. 747 mg (5.40 mmol) of potassium carbonate was added and the mixture was stirred at RT for 3 h. Subsequently, the mixture was poured onto 73 ml of water and stirred briefly, and the precipitated solids were filtered off, washed with water and dried. 462 mg of the title compound were obtained (33% of theory; 85% purity).

Provenance & Evidence