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<front>
<journal-meta>
<journal-id journal-id-type="doi">10.1002/(ISSN)1521-3773</journal-id>
<journal-id journal-id-type="publisher-id">ANIE</journal-id>
<journal-title-group>
<journal-title xml:lang="en">Angewandte Chemie International Edition</journal-title>
<abbrev-journal-title abbrev-type="publisher" xml:lang="en">Angew. Chem. Int. Ed.</abbrev-journal-title>
</journal-title-group>
<issn publication-format="ppub">1433-7851</issn>
<issn publication-format="epub">1521-3773</issn>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.1002/anie.202307782</article-id>
<article-id pub-id-type="publisher-id">ANIE202307782</article-id>
<article-categories>
<subj-group subj-group-type="overline" xml:lang="en">
<subject>Research Article</subject>
</subj-group>
<subj-group subj-group-type="heading" xml:lang="en">
<subject>Research Articles</subject>
<subj-group subj-group-type="heading" xml:lang="en">
<subject>Peptide Modification | Very Important Paper</subject>
</subj-group>
</subj-group>
</article-categories>
<title-group>
<article-title xml:lang="en">Tryptophan in Multicomponent Petasis Reactions for Peptide Stapling and Late‐Stage Functionalisation</article-title>
</title-group>
<contrib-group>
<contrib id="anie202307782-cr-0001" contrib-type="author" corresp="yes">
<name>
<surname>Krajcovicova</surname>
<given-names>Sona</given-names>
<prefix>Dr.</prefix>
</name>
<contrib-id contrib-id-type="orcid">http://orcid.org/0000-0003-0139-2360</contrib-id>
<email>sk2178@cam.ac.uk</email>
<xref ref-type="aff" rid="anie202307782-aff-0001">
<sup>1</sup>
</xref>
<xref ref-type="aff" rid="anie202307782-aff-0002">
<sup>2</sup>
</xref>
</contrib>
<contrib id="anie202307782-cr-0002" contrib-type="author">
<name>
<surname>Spring</surname>
<given-names>David R.</given-names>
<prefix>Prof.</prefix>
</name>
<contrib-id contrib-id-type="orcid">http://orcid.org/0000-0001-7355-2824</contrib-id>
<xref ref-type="aff" rid="anie202307782-aff-0001">
<sup>1</sup>
</xref>
</contrib>
</contrib-group>
<aff id="anie202307782-aff-0001">
<label>
<sup>1</sup>
</label>

<named-content content-type="organisation-division">Department of Chemistry</named-content>

<institution>University of Cambridge</institution>

<named-content content-type="street">Lensfield road</named-content>
 <named-content content-type="street">CB2 1EW</named-content>
 <city>Cambridge</city>
 <country country="GB">UK</country>

</aff>
<aff id="anie202307782-aff-0002">
<label>
<sup>2</sup>
</label>

<named-content content-type="organisation-division">Department of Organic Chemistry</named-content>

<institution>Palacky University Olomouc</institution>

<named-content content-type="street">Tr. 17. Listopadu 12</named-content>
 <postal-code>77900</postal-code>
 <city>Olomouc</city>
 <country country="CZ">Czech Republic</country>

</aff>
<pub-date date-type="pub" publication-format="electronic"><day>13</day>
<month>07</month>
<year>2023</year>
</pub-date><elocation-id>e202307782</elocation-id>
<history>

<date date-type="received">
<day>02</day>
<month>06</month>
<year>2023</year>
</date>

</history>
<permissions>
<copyright-statement content-type="issue-copyright">© 2023 Wiley‐VCH GmbH</copyright-statement>
<copyright-statement content-type="article-copyright">© 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH</copyright-statement>
<copyright-year>2023</copyright-year>
<copyright-holder>© 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH</copyright-holder>
<license>
<ali:license_ref>http://creativecommons.org/licenses/by/4.0/</ali:license_ref>
<license-p>This is an open access article under the terms of the <ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution</ext-link> License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.</license-p>
</license>
</permissions>
<abstract xml:lang="en" abstract-type="main">
<title>Abstract</title>
<p xml:lang="en">Peptide stapling is a robust strategy for generating enzymatically stable, macrocyclic peptides. The incorporation of biologically relevant tags (such as cell‐penetrating motifs or fluorescent dyes) into peptides, while preserving their binding interactions and enhancing their stability, is highly sought after. Despite the unique opportunities offered by tryptophan‘s indole scaffold for targeted functionalisation, its utilisation in peptide stapling has been limited as compared to other amino acids. Herein, we present an approach for peptide stapling using the tryptophan‐mediated Petasis reaction. This method enables the synthesis of both stapled and labelled peptides and is applicable to both solution and solid‐phase synthesis. Importantly, the use of the Petasis reaction in combination with tryptophan facilitates the formation of stapled peptides in a straightforward, multicomponent fashion, while circumventing the formation of undesired by‐products. Furthermore, this approach allows for efficient and diverse late‐stage peptide modifications, thereby enabling rapid production of numerous conjugates for biological and medicinal applications.</p>
</abstract>
<kwd-group kwd-group-type="author-generated" xml:lang="en">
<kwd id="anie202307782-kwd-0001">Late-Stage Functionalization</kwd>
<kwd id="anie202307782-kwd-0002">Macrocycles</kwd>
<kwd id="anie202307782-kwd-0003">Multicomponent Reactions</kwd>
<kwd id="anie202307782-kwd-0004">Peptides</kwd>
<kwd id="anie202307782-kwd-0005">Tryptophan</kwd>
</kwd-group>
<funding-group>
<award-group id="funding-0001">
<funding-source>

<institution-wrap>
<institution>Nadace Experientia (Experientia Foundation)</institution>
<institution-id>http://dx.doi.org/10.13039/100013994</institution-id>
</institution-wrap>

</funding-source>
</award-group>
</funding-group>
<funding-group>
<award-group id="funding-0002">
<funding-source>

<institution-wrap>
<institution>Grantová Agentura České Republiky (Czech Science Foundation)</institution>
<institution-id>http://dx.doi.org/10.13039/501100001824</institution-id>
</institution-wrap>

</funding-source>
<award-id>GACR 22-07138O</award-id>
</award-group>
</funding-group>
<funding-group>
<award-group id="funding-0003">
<funding-source>

<institution-wrap>
<institution>Cambridge Isaac Newton Trust</institution>
<institution-id>http://dx.doi.org/10.13039/501100004815</institution-id>
</institution-wrap>

</funding-source>
<award-id>22.39(l)</award-id>
</award-group>
</funding-group>
<counts>
<fig-count count="7"/>
<table-count count="0"/>
<ref-count count="34"/>
<page-count count="10"/>
<word-count count="0"/>
</counts>
</article-meta>
</front>
</article>