Water → L-methionyl-L-aspartyl-D-alanine amide hydrochloride

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Reaction Steps

12.54 Parts of N-t-butoxycarbonyl-L-methionyl-L-aspartyl-D-alanine amide is dissolved in 107 parts by volume glacial acetic acid and 51.66 parts by volume of a 5.6 M solution of HCl/dioxane. The resultant mixture is stirred for 20 minutes and then stripped under reduced pressure to afford a solid. The solid is triturated with ethyl ether, cooled, and the resultant product washed with cold ethyl ether and vacuum dried. This solid is purified by countercurrent distribution to afford L-methionyl-L-aspartyl-D-alanine amide hydrochloride hydrated with 2/3 mole of water per mole, and represented by the following formula.

Provenance & Evidence