Sodium Bicarbonate → sodium 8-methoxy-1-oxo-1H-2-benzopyran-3-carboxylate

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Reaction Steps

To a stirred suspension of the carboxylic acid of Example 5 (3.7529 g., 17.05 mM) in 225 ml. of distilled water is added 1.4324 g. (17.05 mM) of sodium bicarbonate. After stirring 0.75 hour, the solution is filtered and freeze-dried to give a pale green solid. The solid is dried at 100° under vacuum for four hours to give sodium 8-methoxy-1-oxo-1H-2-benzopyran-3-carboxylate as a pale green solid, m.p. 244°.

Provenance & Evidence