(+)-L-Leucine methyl ester → (S)-4-Methyl-2-{[5-morpholin-4-yl-6-(2,2,2-trifluoro-ethoxy)-pyrazine-2-carbonyl]-amino}-pentanoic acid methyl ester

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In analogy to the procedure described for the synthesis of 6-propoxy-5-pyrrolidin-1-yl-pyrazine-2-carboxylic acid ((S)-1-hydroxymethyl-3-methyl-butyl)-amide (example 10, step d) the title compounds was prepared from 5-morpholin-4-yl-6-(2,2,2-trifluoro-ethoxy)-pyrazine-2-carboxylic acid and (S)-leucine methyl ester (commercially available). m/z (ES+): 435.3 (M+H).

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