摘要:
A process for the Fmoc synthesis of a peptide comprising a thioester or thioacid which comprises removing the Nalpha-Fmoc blocking group with a base selected from optionally substituted piperazine or optionally substituted 2,6-C1-4dialkyl-piperidine or a mixture thereof. Also novel solid supports suitable for the solid-state synthesis of peptide thioesters and thioacids and processes for making these supports.
摘要翻译:包含硫酯或硫代酸的肽的Fmoc合成方法,其包括用选自任选取代的哌嗪或任选取代的2,6- C 1-4二烷基 - 哌啶或其混合物的碱去除Nalpha-Fmoc封闭基团。 还有适用于肽硫酯和硫代酸的固态合成的新型固体支持体和制备这些载体的方法。
摘要:
The invention relates to the preparation of polypeptides by solid phase synthesis by attachment of carboxy-protected amino acids to the carboxyl end of a peptide chain bound at its N-terminal to a solid support. The carboxy-protection is by a tertiary alkoxy silyl group. Novel tertiary alkoxy silyl amino acid esters are disclosed which may be used as intermediates.
摘要:
The present invention provides a method of synthesizing an intramolecularly bridged polypeptide comprising at least one intramolecular bridge. The present invention further provides a method of synthesizing an intramolecularly bridged polypeptide comprising two intramolecular bridges, wherein the two intramolecular bridges form two overlapping ring, two rings in series, or two embedded rings. The present invention also provides methods for synthesizing lantibiotics, including Nisin A. Additionally, the invention provides intramolecularly bridged polypeptides synthesized by the methods disclosed herein and differentially protected orthogonal lanthionines.
摘要:
The present invention provides methods of assembling oligopeptides or polypeptides in a native chemical ligation reaction that eliminates the formation of unwanted side products resulting from the presence of an unprotecte acidic C-terminal oligopeptide thioester. An important aspect of the present invention is providing side chain protected acidic C-terminal oligopeptide thioesters. The present invention is useful in methods for chemical synthesis of oligopeptides, polypeptides and proteins and improves the efficiency of native chemical ligation reactions, particularly where aspartyl or glutamyl peptide fragments are used to assemble an oligopeptide, polypeptide or protein product.
摘要:
The present invention provides methods of assembling oligopeptides or polypeptides in a native chemical ligation reaction that eliminates the formation of unwanted side products resulting from the presence of an unprotecte acidic C-terminal oligopeptide thioester. An important aspect of the present invention is providing side chain protected acidic C-terminal oligopeptide thioesters. The present invention is useful in methods for chemical synthesis of oligopeptides, polypeptides and proteins and improves the efficiency of native chemical ligation reactions, particularly where aspartyl or glutamyl peptide fragments are used to assemble an oligopeptide, polypeptide or protein product.
摘要:
There is provided by the present invention a side chain protected amino acid derivative as described in general formula (I), wherein R1 may represent -CH2CH2CH2CH2NH-, -CH2CO- or -CH2CH2CO-, and R2 may represent phenylthioethyloxycarbonyl(Ptc), phenylsulfonylethyloxycarbonyl(Psc), phenylthioethyloxy(OPte) or phenylsulfonylethyloxy(OPse), and R3 may represent hydrogen or alpha -amino protecting group; and pharmaceutically acceptable salt thereof, which have high stability but also good reactivity under the process for preparing peptides.
摘要:
Process for the production of peptides of general formula R1CO-NHR2 (I), where R1CO- is the carboxy component and R2NH- is the amino component of a peptide building block. The process is characterized in that a carboxylic acid of general formula R1COOH (II), where R1CO- has the above meaning, is made to react with a carboxylic acid imide chloride of general formula (III), wherein X is a hydrogen atom, an alkyl group with a maximum of 4 carbon atoms, a fluorine atom, a chlorine atom or a nitro group, Y is a fluorine atom, a chlorine atom or a nitro group and Z has the same meaning as Y or is a hydrogen atom, and the diacylamine of general formula (IV), where R1, X, Y and Z have the above meaning, is bound to an amine of general formula R2NH2 (V), where R2NH- have the above-mentioned meaning.