Hydrochloric Acid → HCID 178428871, compound

Participants

Reaction Steps

90 mg (0.91 mmol) of 5-hydroxy-1-methylpyrazole and a spatula tip of 4-(dimethylamino)pyridine were added to 230 mg (0.83 mmol) of 2-methyl-3-methylsulfinyl-4-methylsulfonylbenzoic acid in 20 ml of CH2Cl2. 191 mg (0.99 mmol) of 1-(3′-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride were added, and the mixture was stirred at RT for 90 min. 3 ml of 1M HCl were then added, and the organic phase was freed from the solvent. 168 mg (1.66 mmol) of triethylamine, 10 drops of acetone cyanohydrin and a spatula tip of potassium cyanide were added to the residue in 15 ml of acetonitrile. The reaction mixture was stirred at RT for 16 h and then freed from the solvent. 15 ml of CH2Cl2 were added to the residue, and 2 ml of 1M HCl were then added. After phase separation, the organic phase was freed from the solvent. The residue was stirred with 25 ml of a mixture of aqueous saturated sodium bicarbonate solution and diethyl ether at RT for 10 min. The phases were separated, and the aqueous phase was acidified with dilute HCl and then extracted three times with CH2Cl2. The combined organic phases were freed from the solvent. This gave 171 mg of clean product.

Provenance & Evidence