Glyoxal → HCID 12918841, compound

Participants

Reaction Steps

To a solution of 2.0 grams (0.010 mole) of 1-[5-(1,1-dimethylethyl)-3-isoxazolyl]-3-methylurea in 50 milliliters of 95 percent ethanol was added 7.3 grams of a 40 percent aqueous glyoxal solution which had been previously adjusted to pH 7 with dilute sodium hydroxide solution. After standing at room temperature overnight, the solution was topped on a rotary evaporator to give an oily residue which was extracted with two 20 milliliter portions of chloroform. The extract was washed with saturated sodium chloride solution, filtered through silicone-treated paper, and concentrated on a rotary evaporator to give 2.0 grams of oily residue. Crystallization from ether gave 0.4 grams of white crystals of 3-[5-(1,1-dimethylethyl)-3-isoxazolyl]-4,5-dihydroxy-1-methyl-2-imidazolidinone, M.P. 153°-157° C., which had consistent mass, infrared and NMR spectra.

Provenance & Evidence