Ammonium Chloride → 1-(3-Cyclopropylmethoxy-4-difluoromethoxy-phenyl)-2-(3,5-dichloro-pyridin-4-yl)-ethanol

Participants

Reaction Conditions

Reaction Steps

A solution of 3-cyclopropylmethoxy-4-difluoromethoxy-benzaldehyde (5.00 g) and 3,5-dichloro-4-methylpyridine (2.57 g) in 50 ml dry THF was cooled to −30° C. Solid potassium t-butoxide (tBuOK, 1.96 g) was added portionwise maintaining the temperature between −30° C. and −20° C., thus obtaining a dark red solution. After completion of the addition, the mixture was stirred at −30° C. for 1 hour. A saturated aqueous solution of NH4Cl (50 ml) was then added to the reaction mixture, maintaining the temperature between −5° C. and −10° C. The color of the reaction mixture turned to yellow.

Provenance & Evidence