A Peptide Backbone Stapling Strategy Enabled by the Multicomponent Incorporation of Amide N‐Substituents
作者:Manuel G. Ricardo、Javiel F. Marrrero、Oscar Valdés、Daniel G. Rivera、Ludger A. Wessjohann
DOI:10.1002/chem.201805318
日期:2019.1.14
N‐modification of peptides on solid‐phase is presented as a powerful and general method to enable peptidestapling at the backbone instead of the side chains. This work shows that a variety of functionalized N‐substituents suitable for backbone stapling can be readily introduced by means of on‐resin Ugi multicomponent reactions conducted during solid‐phase peptide synthesis. Diverse macrocyclization chemistries
Highly Stereoselective Synthesis of Natural-Product-Like Hybrids by an Organocatalytic/Multicomponent Reaction Sequence
作者:Radell Echemendía、Alexander F. de La Torre、Julia L. Monteiro、Michel Pila、Arlene G. Corrêa、Bernhard Westermann、Daniel G. Rivera、Márcio W. Paixão
DOI:10.1002/anie.201412074
日期:2015.6.22
In an endeavor to provide an efficient route to natural product hybrids, described herein is an efficient, highly stereoselective, one‐pot process comprising an organocatalytic conjugate addition of 1,3‐dicarbonyls to α,β‐unsaturated aldehydes followed by an intramolecular isocyanide‐based multicomponent reaction. This approach enables the rapid assembly of complex natural product hybrids including
Peptide Macrocyclization Assisted by Traceless Turn Inducers Derived from Ugi Peptide Ligation with Cleavable and Resin-Linked Amines
作者:Alfredo R. Puentes、Micjel C. Morejón、Daniel G. Rivera、Ludger A. Wessjohann
DOI:10.1021/acs.orglett.7b01761
日期:2017.8.4
multicomponent approach enabling the installation of turn-inducing moieties that facilitate the macrocyclization of short and medium-size oligopeptides is described. The strategy comprises the Ugi ligation of peptide carboxylic acids and isocyanopeptides in the presence of aldehydes and acid or photolabile amines followed by cyclization and cleavage of the backbone N-substituents to render canonical
trans-benzoylanino-4-methylthio-2-azetidinones 16, bearing an acetonide-protected β,β'-bis(hydroxymethyl)acrylate moiety and being potential candidates for the totalsynthesis of 1-oxacephems, were obtained from 2,2-dimethyl-1,3-dioxan-5-one (4), alkyi isocyanoacetates 3 and azidoacetyl chloride (5) with 5 steps in overall yields of 13–33%. 2-Formylaminoacrylates 6, 1,3-thiazoline-4-carboxylates 9, produced by di=rect
Exploiting domino enyne metathesis mechanisms for skeletal diversity generation
作者:Richard J. Spandl、Hèléne Rudyk、David R. Spring
DOI:10.1039/b807278g
日期:——
In the context of diversity-oriented synthesis, the exploration and optimization of the dominometathesis of decorated norbornenes allowed complex polycyclic architectures to be generated in a highly efficient and atom-economical process.