Sulfamic Acid → 3-(benzyloxy)-6-methyl-4-oxo-4H-pyran-2-carboxylic acid

Participants

Reaction Steps

2-Formyl-3-benzyloxy-6-methyl-pyran-4(1H)-one (3.67 g, 15.03 mmol, 1 eq) was dissolved in acetone (50 ml) and the solution diluted with water (50 ml). To the reaction mixture was added sulfamic acid (2.04 g, 21.04 mmol, 1.4 eq) and 80% sodium chlorite (1.78 g, 15.8 mmol, 1.05 eq) and allowed to stir for 1 hour at room temperature in an open vessel. Removal of acetone in vacuo yielded crude product as a precipitate in the remaining aqueous solution. The solid was collected, washed with absolute ethanol and dried (3.32 g, 85%). m.p. 173-175° C.

Provenance & Evidence