1,5-tetramethyleno-2,4,6,8-tetra(hydroxymethyl)glycoluril 、 L-methionine potassium salt 以
水 为溶剂,
反应 2.0h,
以87%的产率得到(S,S)-2-[8b,8c-tetramethyleno-6-(1-carboxy-2-methylthiopropyl)-4,8-dioxotetrahydro-2,3a,4a,6,7a,8a-hexaazacyclopenta[def]fluoren-2-yl]-4-methylthiobutanoic acid