Peptidecyclizationstrategies Peptide macrocyclization is a crucial technique in modern chemistry, enabling the creation of constrained peptide structures with enhanced pharmacological properties and bioactivity作者：X Chu·2021·被引用次数：21—Thismacrocyclization strategywas then applied to a wide range ofpeptidesubstrates and iodoarene reagents. The majority of iodoarenes are .... This field has seen significant advancements, moving beyond traditional methods to embrace diverse, state-of-the-art macrocyclization methodologies. Contemporary strategies aim to address the major challenges in synthesizing these complex molecules, offering innovative solutions for peptide sequence-level optimization and the development of novel therapeutic agents.Contemporary strategies for peptide macrocyclization. · Peptide macrocyclization through amide-to-amide transpeptidation · Chemoselective cyclization of ...
The formation of a peptide macrocycle involves creating a covalent bond that closes a linear peptide chain into a ring. This structural constraint is often employed to fix specific bioactive conformations, which can lead to improved receptor binding affinity, increased metabolic stability, and enhanced cell permeability. Consequently, macrocyclic peptides are gaining prominence in drug discovery and development, serving as scaffolds for a new generation of therapeutics. The drive to develop more efficient and versatile macrocyclization techniques is a testament to their growing significance.作者：JM Smith·2013·被引用次数：43—In this synopsis, we highlightcontemporary strategies to access peptide macrocyclesfrom ribosomally produced polypeptides. Challenges that ...
Historically, peptide macrocyclization relied heavily on classical lactamization, forming amide bonds between the N-terminus and a C-terminal carboxyl group, or between side chains. While effective, these methods can be challenging due to conformational preferences of the peptide backbone and potential side reactionsIn recent years, great progress has been made in identifyingnew cyclization strategies for peptide macrocyclization, spanning a wide range of chemistries from.. The field has since expanded dramatically, incorporating a wide array of modern organic chemistry approaches.
Recent developments include sophisticated cyclization strategies that leverage various functional groups and reaction mechanisms. These contemporary strategies often focus on creating linkages other than simple amide bonds, such as those formed through imine and imine analogue formation, or through palladium-catalyzed reactions like C-H activation.Emerging Strategies to Access Peptide Macrocycles from ... Such approaches offer greater control over regioselectivity and can be applied to a broader range of peptide substratesThree Methods for Peptide Cyclization Via Lactamization - PubMed.
A significant area of innovation lies in the development of "new cyclization strategies for peptide macrocyclization" that move beyond established protocols. These include:
* Metal-Catalyzed Cyclizations: Palladium-catalyzed reactions, for instance, have emerged as powerful tools for constructing peptide macrocycles作者：C Nitsche·2019·被引用次数：72—3. White, C. J.; Yudin, A. K.,Contemporary strategies for peptide macrocyclization. Nat. Chem. 2011, 3, 509–524.. These methods often involve intramolecular C-H activation or cross-coupling reactions, allowing for the formation of carbon-carbon or carbon-heteroatom bonds within the peptide chain.Dipolar Cycloaddition of Azomethine Ylides This offers a high degree of synthetic flexibility and can be applied in late-stage functionalization.
* Click Chemistry Approaches: Reactions such as the azide-alkyne cycloaddition provide efficient and biocompatible routes to macrocyclic structures.In recent years, great progress has been made in identifyingnew cyclization strategies for peptide macrocyclization, spanning a wide range of chemistries from. These methods are known for their high yields, specificity, and tolerance of various functional groups, making them attractive for complex peptide synthesis.
* Biomimetic and Biosynthetic Strategies: Inspired by natural product biosynthesis, researchers are developing strategies that mimic enzymatic processes. This includes leveraging specific amino acid residues, such as cysteine, for facile and biocompatible cyclization through reactions like disulfide bond formation or Michael additions. The development of efficient two-step strategies often draws from these principles.
* Solution-Phase vs. Solid-Phase Synthesis: While solid-phase peptide synthesis (SPPS) has been a cornerstone of peptide chemistry, solution-phase strategies remain vital, particularly for macrocyclization steps involving larger quantities or when specific reaction conditions are required. The choice between these approaches depends on the specific peptide sequence and desired macrocycle.
Despite the significant progress, challenges persist in peptide macrocyclization. These include achieving regioselectivity, controlling conformational outcomes, and improving the efficiency of cyclization for longer or more complex peptide sequencesMacrocyclization strategies for cyclic peptides and .... Furthermore, transitioning macrocyclic peptides to cell-permeable drugs requires strategies that enhance their pharmacokinetic properties, a goal that macrocyclization itself helps to achieve.
The ongoing exploration of "diverse state-of-the-art macrocyclization methodologies and techniques" continues to push the boundaries of what is possible.Rapid Peptide Cyclization Inspired by the Modular Logic of ... Future research is likely to focus on developing more sustainable and environmentally friendly methods, expanding the repertoire of accessible macrocyclic scaffolds, and integrating computational design with experimental synthesis to accelerate the discovery of novel peptide-based therapeutics. The pursuit of innovative synthetic strategies enabling efficient macrocyclization will remain a key driver in this dynamic fieldPeptide Macrocyclization Strategies - Macro-Cyclic ....
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