Ethanol → DW-1350

Participants

Reaction Steps

While 45 g of 4-5-[4-(5-isopropyl-2-methyl-1,3-thiazol-4-yl)-phenoxy]-pentoxy-benzonitrile (10) prepared in Example 6 were added to 300 ml of ethanol and stirred, 15 g of hydroxylamine hydrochloride and 30 ml of triethylamine were added. The temperature was gradually increased and stirring under reflux was continued for 15 hr. After the reaction was completed, the temperature was decreased to 40° C., and the resultant reaction solution was slowly added with water, thereby being crystallized. The precipitated solid was filtered and washed with water, thus obtaining 44.2 g (yield: 95%) of a title compound as a white solid.

Provenance & Evidence