Solid-phase synthesis of cyclic peptide chitinase inhibitors: SAR of the argifin scaffold.

Solid-phase synthesis of cyclic peptide chitinase inhibitors: SAR of the argifin scaffold.
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环状肽几丁质抑制剂的固相合成:阿昔蛋白支架的SAR。

DOI:
10.1039/b815077j
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发表时间:
2009-01-21
影响因子:
3.2
通讯作者:
Eggleston IM
Eggleston IM
中科院分区:
化学3区
文献类型:
--
作者:
Dixon MJ;Nathubhai A;Andersen OA;van Aalten DM;Eggleston IM

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描述了一种高效的全固相合成精氨酸,一种具有化疗潜力的环肽几丁质酶抑制剂。报道了一种高效全固相合成天然产物环五肽几丁质酶抑制剂精氨酸的新方法。该合成的特点是,在环化和树脂侧链操作之前,将一个正交保护的Asp残基附着在固体载体上,并通过Fmoc SPPS组装线性肽链。在树脂裂解和侧链脱保护之前,通过选择性保护的Orn残基衍生化来引入关键的n -甲基氨基甲酰取代的精氨酸侧链。在最终脱保护时观察到严重的阿斯巴胺副反应,通过使用一种新的水酸解程序来避免。利用天然产物的x射线结构与代表性家族18几丁质酶的配合物设计了一系列的精氨酸类似物,证明了合成的灵活性。
An efficient, all-solid-phase synthesis of argifin, a cyclic peptide chitinase inhibitor with chemotherapeutic potential, is described. A new, highly efficient, all-solid-phase synthesis of argifin, a natural product cyclic pentapeptide chitinase inhibitor, is reported. The synthesis features attachment of an orthogonally protected Asp residue to the solid support and assembly of the linear peptide chain by Fmoc SPPS prior to cyclisation and side-chain manipulation on-resin. Introduction of the key N-methyl carbamoyl-substituted Arg side chain is achieved via derivatisation of a selectively protected Orn residue, prior to cleavage from the resin and side-chain deprotection. A severe aspartimide side-reaction observed upon final deprotection is circumvented by the use of a novel aqueous acidolysis procedure. The flexibility of the synthesis is demonstrated by the preparation of a series of argifin analogues designed from the X-ray structure of the natural product in complex with a representative family 18 chitinase.
DOI: 10.1002/psc.668
发表时间: 2005-10-01
影响因子: 2.1
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