Metal free catalytic hydroboration of multiple bonds in methanol using N-heterocyclic carbenes under open atmosphere

2013 ◽  
Vol 11 (37) ◽  
pp. 6350 ◽  
Author(s):  
Kun Wen ◽  
Jinbo Chen ◽  
Feng Gao ◽  
Pinaki S. Bhadury ◽  
Erkang Fan ◽  
...  
Keyword(s):  
Heterocyclic Carbenes ◽  
Multiple Bonds ◽  
Open Atmosphere ◽  
Metal Free

ChemInform Abstract: Metal Free Catalytic Hydroboration of Multiple Bonds in Methanol Using N-Heterocyclic Carbenes under Open Atmosphere.

ChemInform ◽  
2014 ◽  
Vol 45 (4) ◽  
pp. no-no
Author(s):  
Kun Wen ◽  
Jinbo Chen ◽  
Feng Gao ◽  
Pinaki S. Bhadury ◽  
Erkang Fan ◽  
...  
Keyword(s):  
Heterocyclic Carbenes ◽  
Multiple Bonds ◽  
Open Atmosphere ◽  
Metal Free

scholarly journals Recent Advances in Transition-Metal-Free (4+3)-Annulations

Synthesis ◽  
2021 ◽  
Author(s):  
Heather Lam ◽  
Mark Lautens ◽  
Xavier Abel-Snape ◽  
Martin F. Köllen
Keyword(s):  
Transition Metal ◽  
Boronic Acid ◽  
Lewis Acids ◽  
Acid Catalysis ◽  
Heterocyclic Carbenes ◽  
Bronsted Acids ◽  
Metal Free ◽  
Previous Review ◽  
Dual Activation ◽  
Metal Catalyzed

Abstract(4+3)-Annulations are incredibly versatile reactions which combine a 4-atom synthon and a 3-atom synthon to form both 7-membered carbocycles as well as heterocycles. We have previously reviewed transition-metal-catalyzed (4+3)-annulations. In this review, we will cover examples involving bases, NHCs, phosphines, Lewis and Brønsted acids as well as some rare examples of boronic acid catalysis and photocatalysis. In analogy to our previous review, we exclude annulations involving cyclic dienes like furan, pyrrole, cyclohexadiene or cyclopentadiene, as Chiu, Harmata, Fernándes and others have recently published reviews encompassing such substrates. We will however discuss the recent additions (2010–2020) to the literature on (4+3)-annulations involving other types of 4-atom-synthons.1 Introduction2 Bases3 Annulations Using N-Heterocyclic Carbenes3.1 N-Heterocyclic Carbenes (NHCs)3.2 N-Heterocyclic Carbenes and Base Dual-Activation4 Phosphines5 Acids5.1 Lewis Acids5.2 Brønsted Acids6 Boronic Acid Catalysis and Photocatalysis7 Conclusion

Metal-free activation of C–C multiple bonds through halide ion pairs: Diels–Alder reactions with subsequent aromatization

2008 ◽  
Vol 49 (29-30) ◽  
pp. 4546-4549 ◽  
Author(s):  
Helena Kaper ◽  
Markus Antonietti ◽  
Frédéric Goettmann
Keyword(s):  
Ion Pairs ◽  
Diels Alder ◽  
Multiple Bonds ◽  
Metal Free

scholarly journals Recent Synthesis Developments of Organoboron Compounds via Metal-Free Catalytic Borylation of Alkynes and Alkenes

Molecules ◽  
2018 ◽  
Vol 24 (1) ◽  
pp. 101 ◽  
Author(s):  
Yanmei Wen ◽  
Chunmei Deng ◽  
Jianying Xie ◽  
Xinhuang Kang
Keyword(s):  
Lewis Acids ◽  
Heterocyclic Carbenes ◽  
Lewis Base ◽  
Organoboron Compounds ◽  
Lewis Bases ◽  
Metal Free ◽  
Recent Synthesis

Diboron reagents have been traditionally regarded as “Lewis acids”, which can react with simple Lewis base to create a significant nucleophilic character in one of boryl moieties. In particular, bis(pinacolato)diboron (B2pin2) reacts with simple Lewis bases, such as N-heterocyclic carbenes (NHCs), phosphines and alkoxides. This review focuses on the application of trivalent nucleophilic boryl synthon in the selective preparation of organoboron compounds, mainly through metal-free catalytic diboration and the β-boration reactions of alkynes and alkenes.

scholarly journals NHC-catalysed highly selective aerobic oxidation of nonactivated aldehydes

2013 ◽  
Vol 9 ◽  
pp. 602-607 ◽  
Author(s):  
Lennart Möhlmann ◽  
Stefan Ludwig ◽  
Siegfried Blechert
Keyword(s):  
Selective Oxidation ◽  
Aerobic Oxidation ◽  
Environmentally Friendly ◽  
Heterocyclic Carbenes ◽  
Metal Free ◽  
Reaction Proceeds ◽  
Selective Aerobic Oxidation ◽  
Terminal Oxidation ◽  
Oxidation Agent

This publication describes a highly selective oxidation of aldehydes to the corresponding acids or esters. The reaction proceeds under metal-free conditions by using N-heterocyclic carbenes as organocatalysts in combination with environmentally friendly oxygen as the terminal oxidation agent.

New Trends in the Development of C-P Bond Forming Reactions

2021 ◽  
Vol 25 ◽  
Author(s):  
Vadim D. Romanenko
Keyword(s):  
Heterocyclic Carbenes ◽  
The State ◽  
Organic Substrates ◽  
Elemental Phosphorus ◽  
Multiple Bonds ◽  
Bond Forming ◽  
Phosphorus Containing ◽  
Direct Functionalization ◽  
Synthetic Approaches ◽  
State Of Art

: This article provides reviews related to some innovative (“non-classical”) synthetic strategies for the formation of CP bonds developed during the last decades. It provides examples of the most important milestones in this field, highlighting the state-of-art of functional phosphorus-containing molecules. Among these are the direct functionalization of organic substrates through chlorine-free reactions with elemental phosphorus, syntheses based on phosphinidene (RP) transfer, phosphorylating methodology employing multiple bonds containing P(III) compounds, reactions with stable heterocyclic carbenes, and synthetic approaches using phosphaethynolate and bis(trichlorosilyl)phosphide salts.

N-Heterocyclic carbenes (NHCs) as organocatalysts and structural components in metal-free polymer synthesis

2013 ◽  
Vol 42 (5) ◽  
pp. 2142 ◽  
Author(s):  
Maréva Fèvre ◽  
Julien Pinaud ◽  
Yves Gnanou ◽  
Joan Vignolle ◽  
Daniel Taton
Keyword(s):  
Polymer Synthesis ◽  
Heterocyclic Carbenes ◽  
Structural Components ◽  
Metal Free
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