Methyl 2-benzyl-4-methyl-3,5-dioxopentanoate 、 ethyl (3S)-3-[[(2S)-2-aminohexanoyl]amino]-3-(1,3-benzodioxol-5-yl)propanoate 以
甲醇 为溶剂,
以35%的产率得到ethyl (3S)-3-(1,3-benzodioxol-5-yl)-3-[2-(3-benzyl-4-hydroxy-5-methyl-2-oxopyridin-1-yl)hexanoylamino]propanoate