نتایج جستجو برای: multicomponent reactions

تعداد نتایج: 175303  

2014
Ludovic Eberlin Fabien Tripoteau François Carreaux Andrew Whiting Bertrand Carboni

In the last few years, multicomponent reactions involving boron substituted 1,3-dienes have emerged as important tools in synthetic organic chemistry. The most significant recent results and developments obtained in this area are reported in this review.

Journal: :Dalton transactions 2006
Josef Hamacek Michal Borkovec Claude Piguet

During the past 15 years, coordination chemistry has rapidly developed toward multicomponent assemblies involving several ligands and metal ions, which are connected via intra- or intermolecular processes. The fascinating structural aspect of these complexation reactions has been early recognized for the design of sophisticated (supra)molecular architectures with novel topologies and functions,...

Because of the significant role in biological processes in living cells and the diverse types of physiological activities, heterocyclic compounds are in focus of intense investigations by academic, industry and applied-oriented chemists. Considerably, ascientific renaissance of heterocycles during the last decades is closely related to the development of multicomponent approaches to their s...

Journal: :Chemical communications 2013
Valentina Pirovano Laura Decataldo Elisabetta Rossi Rubén Vicente

A gold-catalyzed formal [4+2] cycloaddition of vinyl indoles and N-allenamides leading to tetrahydrocarbazoles is described. Moreover, new multicomponent reactions of vinyl indoles with two allene molecules are reported.

Journal: :Organic & biomolecular chemistry 2013
Teng-fei Niu Mu Sun Mei-fang Lv Wen-bin Yi Chun Cai

An efficient chemoselective process for the synthesis of 14- and 15-membered triazole-containing macrocycle compounds has been developed through the combination of two multicomponent reactions and an intramolecular Sonogashira cross-coupling reaction.

Journal: :Organic & biomolecular chemistry 2012
Muhammad Abbas Ludger A Wessjohann

Ammonia and selenoaldehydes are both problematic components in Ugi reactions. Here we report the efficient direct multicomponent synthesis of sensitive selenocysteine peptides without the use of convertible (protected) primary amines, including suitable deprotection protocols for selenols.

2014
Gijs Koopmanschap Eelco Ruijter Romano VA Orru

In the recent past, the design and synthesis of peptide mimics (peptidomimetics) has received much attention. This because they have shown in many cases enhanced pharmacological properties over their natural peptide analogues. In particular, the incorporation of cyclic constructs into peptides is of high interest as they reduce the flexibility of the peptide enhancing often affinity for a certa...

Ketenimines and azadienes are transient intermediates in organic chemistry especially in elimination-addition processes and in the formation of heterocyclic systems. These compounds play a considerable role as intermediates in the synthesis of heterocyclic ring systems. In this present research synthesis of novel ketenimines and azadienes via multicomponent reactions (MCRs...

Journal: :SynOpen 2021

Abstract An efficient and straightforward approach has been established for the preparation of a new class depsipeptide structures via isocyanide-based consecutive Bargellini–Passerini multicomponent reactions. 3-Carboxamido-isobutyric acids bearing an amide bond were obtained Bargellini reaction from isocyanides, acetone, chloroform in presence sodium hydroxide. Next, Passerini multicomponent-...

Journal: :Organic & biomolecular chemistry 2015
Manuel G Ricardo Fidel E Morales Hilda Garay Osvaldo Reyes Dimitar Vasilev Ludger A Wessjohann Daniel G Rivera

Increasing the diversity of peptide cyclization methods is an effective way of accessing new types of macrocyclic chemotypes featuring a wide variety of ring sizes and topologies. Multicomponent reactions (MCRs) are processes capable of generating great levels of molecular diversity and complexity at low synthetic cost. In an attempt to further exploit MCRs in the field of cyclopeptides, we des...

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