(S)-2-[4-(1-ethyl-propylamino)-3-nitro-benzoylamino]-4-methyl-pentanoic acid tert-butyl ester 在
钯 silica 、 ethyl acetate heptane 作用下,
以
乙醇 为溶剂,
反应 4.0h,
以to yield 6.5 g (61%) of (S)-2-[3-amino-4-(1-ethyl-propylamino)-benzoylamino]-4-methyl-pentanoic acid tert-butyl ester as a colourless oil的产率得到(S)-2-[3-amino-4-(1-ethyl-propylamino)-benzoylamino]-4-methyl-pentanoic acid tert-butyl ester