首页> 外文期刊>Bulletin of the Chemical Society of Japan >Total Synthesis of Bistratamides G and H from Various Kinds of DELTAAla and DELTA Abu-Containing Oligopeptides
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Total Synthesis of Bistratamides G and H from Various Kinds of DELTAAla and DELTA Abu-Containing Oligopeptides

机译:从各种DELTAAla和DELTA Abu含寡肽完全合成Bistratamides G和H

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摘要

The total synthesis of naturally occurring bistratamides G(1)and H(2)from various kinds of dehydrooligopeptides is described.First of all,the promising building blocks of 1 and 2:N-{2-[(S)-l-(N-benzyloxycarbonyl)amino-2-methyl-propyl]oxazole(4)-and N-{2-[(S)-1-(N-?-butoxycarbonyl)amino-2-methylpropyl]thiazol-4-ylcarbonyl}-L-Val-(S)NH2(5),and methyl(S)-2-{ l-[N-(3-bromo-2-oxopropanoyl)amino-2-methylpropyl]}-5-methyloxazole-4-carboxylate(6),as the left-and right-half components of the linear precursor of 1 and 2,were synthesized.Subsequent thiazolation between 4 or 5 and 6,respectively,followed by deprotection of both N-and O-protecting groups of the two formed linear tris-heterocyclic peptides.By final macrocyclization using BOP as condensing agent under high-dilution conditions these peptides gave the expected 1 and 2.
机译:描述了从各种脱氢寡肽天然合成的双歧酰胺G(1)和H(2)的总合成。首先,有前途的1和2:N- {2-[(S)-1-( N-苄氧基羰基)氨基-2-甲基-丙基]恶唑(4)-和N- {2-[(S)-1-(N-α-丁氧基羰基)氨基-2-甲基丙基]噻唑-4-基羰基}- L-Val-(S)NH2(5)和(S)-2- {1- [N-(N-(3-溴-2-氧代丙酰基)氨基-2-甲基丙基]}-5-甲基恶唑-4-羧酸甲酯(6)合成了1和2的线性前体的左半部分和右半部分。随后分别在4或5和6之间进行了噻唑基化反应,接着是对N和O的两个保护基进行了脱保护两个形成的线性三杂环肽,最后在高稀释条件下使用BOP作为缩合剂进行大环化,得到了预期的1和2。

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