Recent developments in 1,6-addition reactions of para-quinone methides (p-QMs)

2020 ◽  
Vol 7 (13) ◽  
pp. 1743-1778 ◽  
Author(s):  
Jia-Yin Wang ◽  
Wen-Juan Hao ◽  
Shu-Jiang Tu ◽  
Bo Jiang
Keyword(s):  
Recent Progress ◽  
Conjugate Addition ◽  
Addition Reactions ◽  
Quinone Methides ◽  
Comprehensive Overview ◽  
Recent Developments

In this review, we provide a comprehensive overview of recent progress in this rapidly growing field by summarizing the 1,6-conjugate addition and annulation reactions of p-QMs with consideration of their mechanisms and applications.

scholarly journals Cover Feature: para -Quinone Methides as Acceptors in 1,6-Nucleophilic Conjugate Addition Reactions for the Synthesis of Structurally Diverse Molecules (Eur. J. Org. Chem. 18/2020)

2020 ◽  
Vol 2020 (18) ◽  
pp. 2642-2642
Author(s):  
Carolina G. S. Lima ◽  
Fernanda P. Pauli ◽  
Dora C. S. Costa ◽  
Acácio S. de Souza ◽  
Luana S. M. Forezi ◽  
...  
Keyword(s):  
Conjugate Addition ◽  
Addition Reactions ◽  
Quinone Methides

para -Quinone Methides as Acceptors in 1,6-Nucleophilic Conjugate Addition Reactions for the Synthesis of Structurally Diverse Molecules

2020 ◽  
Vol 2020 (18) ◽  
pp. 2650-2692 ◽  
Author(s):  
Carolina G. S. Lima ◽  
Fernanda P. Pauli ◽  
Dora C. S. Costa ◽  
Acácio S. de Souza ◽  
Luana S. M. Forezi ◽  
...  
Keyword(s):  
Conjugate Addition ◽  
Addition Reactions ◽  
Quinone Methides

Stereoselective Reactions of ortho-Quinone Methide and ortho-Quinone Methide Imines and Their Utility in Natural Product Synthesis

Synthesis ◽  
2018 ◽  
Vol 50 (20) ◽  
pp. 4008-4018 ◽  
Author(s):  
Alan Spivey ◽  
Christian Nielsen ◽  
Hossay Abas
Keyword(s):  
Total Synthesis ◽  
Conjugate Addition ◽  
Natural Product Synthesis ◽  
Quinone Methide ◽  
Addition Reactions ◽  
Quinone Methides ◽  
New Methods ◽  
Synthetic Utility ◽  
Stereoselective Reactions ◽  
Significant Attention

Herein presented is a review of the reactivity and synthetic utility of ortho-quinone methides and ortho-quinone methide imines. These versatile intermediates have received significant attention in the literature and new methods for their preparation and reaction as well as recent applications in total synthesis are discussed.1 Introduction2 Conjugate Addition Reactions3 Concerted Cycloaddition Reactions4 Stepwise Addition Reactions5 Applications in Total Synthesis6 Conclusion

Exploring bis-(amino)cyclopropenylidene as a non-covalent Brønsted base catalyst in conjugate addition reactions

2018 ◽  
Vol 16 (3) ◽  
pp. 384-388 ◽  
Author(s):  
Gurdeep Singh ◽  
Prithwish Goswami ◽  
Ramasamy Vijaya Anand
Keyword(s):  
Conjugate Addition ◽  
Addition Reactions ◽  
Base Catalyst ◽  
Quinone Methides ◽  
Carbon Nucleophiles ◽  
Catalytic Application ◽  
Brønsted Base

The catalytic application of bis-(amino)cyclopropenylidene, as a non-covalent Brønsted base, in the 1,4- and 1,6-conjugate addition of carbon nucleophiles to enones andp-quinone methides, respectively, is described.

Copper-catalyzed 1,6-conjugate addition of para-quinone methides with diborylmethane

2021 ◽  
Author(s):  
Xin Li ◽  
Guoliang Gao ◽  
Songtao He ◽  
Qiuling Song
Keyword(s):  
Catalytic System ◽  
Conjugate Addition ◽  
Quinone Methides ◽  
High Yields

Presented herein is the first 1,6-conjugate addition of diborylmethane, which is promoted by a simple and inexpensive copper catalytic system. This method features high yields, good selectivities and broad functional...

scholarly journals A Review on Recent Progress of Glycan-Based Surfactant Micelles as Nanoreactor Systems for Chemical Synthesis Applications

2021 ◽  
Vol 2 (1) ◽  
pp. 168-186
Author(s):  
Bahareh Vafakish ◽  
Lee D. Wilson
Keyword(s):  
Chemical Synthesis ◽  
Chemical Reactions ◽  
Recent Progress ◽  
Chemical Species ◽  
Reaction Rates ◽  
Bulk Solution ◽  
Surfactant Micelles ◽  
Conventional Surfactant ◽  
Recent Developments ◽  
To Receive

The nanoreactor concept and its application as a modality to carry out chemical reactions in confined and compartmentalized structures continues to receive increasing attention. Micelle-based nanoreactors derived from various classes of surfactant demonstrate outstanding potential for chemical synthesis. Polysaccharide (glycan-based) surfactants are an emerging class of biodegradable, non-toxic, and sustainable alternatives over conventional surfactant systems. The unique structure of glycan-based surfactants and their micellar structures provide a nanoenvironment that differs from that of the bulk solution, and supported by chemical reactions with uniquely different reaction rates and mechanisms. In this review, the aggregation of glycan-based surfactants to afford micelles and their utility for the synthesis of selected classes of reactions by the nanoreactor technique is discussed. Glycan-based surfactants are ecofriendly and promising surfactants over conventional synthetic analogues. This contribution aims to highlight recent developments in the field of glycan-based surfactants that are relevant to nanoreactors, along with future opportunities for research. In turn, coverage of research for glycan-based surfactants in nanoreactor assemblies with tailored volume and functionality is anticipated to motivate advanced research for the synthesis of diverse chemical species.

Recent Developments in Social Policy in the New European Union

ILR Review ◽  
1994 ◽  
Vol 48 (1) ◽  
pp. 5-27 ◽  
Author(s):  
John T. Addison ◽  
W. Stanley Siebert
Keyword(s):  
European Union ◽  
Labor Market ◽  
Recent Progress ◽  
Adjustment Costs ◽  
Labor Policy ◽  
Market Regulation ◽  
The European Union ◽  
Recent Developments ◽  
Labor Market Regulation ◽  
Future Direction

This paper assesses the recent progress and future direction of labor policy in the European Community, now the European Union. The authors show that most of the mandates foreshadowed under the December 1989 Community Social Charter have now been enacted into law. They analyze the possible costs, as well as the benefits, of these firstphase mandates and show the link between these adjustment costs and the Community's policy of providing subsidies to its poorer member states. They also demonstrate how the new Treaty on European Union, agreed to at Maastricht in December 1991, has increased the scope for Community-level labor market regulation.

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