(2S)-N-[(1R)-1-(3,5-dihydroxyphenyl)-2-[(1S)-2-[(1R)-1-(3,5-dihydroxyphenyl)-2-hydroxy-2-[(1S)-1-(4-hydroxyphenyl)-2-methoxy-2-oxoethyl]iminoethyl]imino-2-hydroxy-1-(4-hydroxyphenyl)ethyl]imino-2-hydroxyethyl]-2-[[(2R)-2-(3,5-dihydroxyphenyl)-1-hydroxy-2-[[(2R)-1-hydroxy-2-(4-hydroxyphenyl)-2-[[hydroxy(phenylmethoxy)methylidene]amino]ethylidene]amino]ethylidene]amino]-3-methylbutanimidic acid 在
三甲基氢氧化锡 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 4.0h,
以84%的产率得到(2S)-2-[[(2R)-2-(3,5-dihydroxyphenyl)-2-[[(2S)-2-[[(2R)-2-(3,5-dihydroxyphenyl)-2-[[(2S)-2-[[(2R)-2-(3,5-dihydroxyphenyl)-1-hydroxy-2-[[(2R)-1-hydroxy-2-(4-hydroxyphenyl)-2-[[hydroxy(phenylmethoxy)methylidene]amino]ethylidene]amino]ethylidene]amino]-1-hydroxy-3-methylbutylidene]amino]-1-hydroxyethylidene]amino]-1-hydroxy-2-(4-hydroxyphenyl)ethylidene]amino]-1-hydroxyethylidene]amino]-2-(4-hydroxyphenyl)acetic acid