Sodium Hydroxide → L-carnosine zinc

Participants

Reaction Steps

Sodium hydroxide (3.51 g) was dissolved in methanol (100 ml), and L-carnosine (9.96 g) was added to the solution to prepare a uniform solution. A solution with zinc acetate dihydrate (9.67 g) dissolved in methanol (145 ml) was added dropwise over 30 minutes to the uniform solution. As a result, white precipitate was gradually formed. After completion of the addition, the mixture was stirred for 2 hours, left to stand overnight and then filtered. The resultant filter cake was then washed with water (140 ml) and air-dried at 80° C. for 5 hours to obtain a crystalline L-carnosine zinc salt (12.4 g) as white powdery crystals.

Provenance & Evidence