Recent Advances on Annulation Reactions with Allyl and Propargyl Sulfonium Salts

Synthesis ◽  
2021 ◽  
Author(s):  
Qing-Zhu Li ◽  
Wen-Lin Zou ◽  
Zhi-Qiang Jia ◽  
Jun-Long Li
Keyword(s):  
Building Blocks ◽  
Sulfonium Salt ◽  
Comprehensive Overview ◽  
Sulfonium Salts ◽  
Recent Advances ◽  
Recent Developments ◽  
Sulfur Ylide

Allyl and propargyl sulfonium salts are readily available reagents and have recently emerged as versatile building blocks in the assembly of cyclic skeletons. As an alternative to the classical sulfonium salts, allyl and propargyl sulfonium salts can convert to the corresponding vinyl sulfur ylide or allenic sulfonium salt intermediates that contain diverse nucleophilic or electrophilic reactive positions, thereby enabling a great variety of annulation reactions. In this review, we provide a comprehensive overview of the recent developments on this growing field by summarizing the annulation reactions involving allyl and propargyl sulfonium salts.

scholarly journals Recent Advances in Palladium-Catalyzed Isocyanide Insertions

Molecules ◽  
2020 ◽  
Vol 25 (21) ◽  
pp. 4906
Author(s):  
Jurriën W. Collet ◽  
Thomas R. Roose ◽  
Bram Weijers ◽  
Bert U. W. Maes ◽  
Eelco Ruijter ◽  
...  
Keyword(s):  
Organic Synthesis ◽  
Building Blocks ◽  
Insertion Reactions ◽  
Chemical Reagents ◽  
The Past ◽  
Recent Advances ◽  
Recent Developments ◽  
Palladium Catalyzed ◽  
Made In ◽  
Rapid Incorporation

Isocyanides have long been known as versatile chemical reagents in organic synthesis. Their ambivalent nature also allows them to function as a CO-substitute in palladium-catalyzed cross couplings. Over the past decades, isocyanides have emerged as practical and versatile C1 building blocks, whose inherent N-substitution allows for the rapid incorporation of nitrogeneous fragments in a wide variety of products. Recent developments in palladium catalyzed isocyanide insertion reactions have significantly expanded the scope and applicability of these imidoylative cross-couplings. This review highlights the advances made in this field over the past eight years.

Recent Advances in the Synthesis and Chemistry of Nitronates

Synthesis ◽  
2017 ◽  
Vol 49 (15) ◽  
pp. 3255-3268 ◽  
Author(s):  
Andrey Tabolin ◽  
Alexey Sukhorukov ◽  
Sema Ioffe ◽  
Alexander Dilman
Keyword(s):  
Carbon Atom ◽  
Stereoselective Synthesis ◽  
Building Blocks ◽  
Short Review ◽  
Bioactive Molecules ◽  
Silyl Nitronates ◽  
Recent Advances ◽  
Recent Developments

Due to their availability and versatile reactivity, nitronates have become important building blocks in the stereoselective synthesis of bioactive molecules. This short review provides a summary of recent developments on the synthesis, chemistry and applications of O-alkyl and O-silyl nitronates.1 Introduction2 Approaches to the Synthesis of Nitronates2.1 Synthesis of Six-Membered Cyclic Nitronates2.1.1 Formal [4+2] Approaches2.1.2 Formal [3+3] Approaches2.1.3 Other Approaches2.2 Synthesis of Five-Membered Cyclic Nitronates2.2.1 Formal [3+2] Approaches2.2.2 Formal [4+1] Approaches2.2.3 Oxidation Approaches3 Chemistry of Nitronates3.1 Nitronates as α-C-Nucleophiles3.2 Nitronates as α-C-Electrophiles3.3 Nitronates in [3+n]-Annulation Reactions3.4 Reactions Involving the β-Carbon Atom of Nitronates3.5 Miscellaneous Transformations4 Conclusion

Recent developments in III–V semiconducting nanowires for high-performance photodetectors

2017 ◽  
Vol 1 (4) ◽  
pp. 630-645 ◽  
Author(s):  
Lifan Shen ◽  
Edwin Y. B. Pun ◽  
Johnny C. Ho
Keyword(s):  
Infrared Spectra ◽  
High Performance ◽  
Comprehensive Overview ◽  
Semiconducting Nanowires ◽  
Recent Advances ◽  
Recent Developments ◽  
Uv Visible

We present a comprehensive overview of the recent advances in III–V NW-based photodetectors operating in the UV, visible and infrared spectra range.

scholarly journals In-Fiber Interferometric-Based Sensors: Overview and Recent Advances

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 265
Author(s):  
Amalia Miliou
Keyword(s):  
Refractive Index ◽  
Fiber Optic ◽  
Operating Principle ◽  
Comprehensive Overview ◽  
Interferometric Sensors ◽  
Recent Advances ◽  
Different Types ◽  
Recent Developments

In-fiber interferometric-based sensors are a rapidly growing field, as these sensors exhibit many desirable characteristics compared to their regular fiber-optic counterparts and are being implemented in many promising devices. These sensors have the capability to make extremely accurate measurements on a variety of physical or chemical quantities such as refractive index, temperature, pressure, curvature, concentration, etc. This article is a comprehensive overview of the different types of in-fiber interferometric sensors that presents and discusses recent developments in the field. Basic configurations, a brief approach of the operating principle and recent applications are introduced for each interferometric architecture, making it easy to compare them and select the most appropriate one for the application at hand.

Combinatorial Peptide Libraries for Selecting Inorganic-Binding Proteins: A Step in Molecular Biomimetics

2003 ◽  
Vol 773 ◽  
Author(s):  
C. Tamerler ◽  
S. Dinçer ◽  
D. Heidel ◽  
N. Karagûler ◽  
M. Sarikaya
Keyword(s):  
Binding Proteins ◽  
Building Blocks ◽  
Molecular Engineering ◽  
Inorganic Materials ◽  
Combinatorial Peptide Libraries ◽  
Self Assembling ◽  
Complex Functions ◽  
Recent Developments ◽  
Specific Proteins ◽  
Molecular Biomimetics

AbstractProteins, one of the building blocks in organisms, not only control the assembly in biological systems but also provide most of their complex functions. It may be possible to assemble materials for practical technological applications utilizing the unique advantages provided by proteins. Here we discuss molecular biomimetic pathways in the quest for imitating biology at the molecular scale via protein engineering. We use combinatorial biology protocols to select short polypeptides that have affinity to inorganic materials and use them in assembling novel hybrid materials. We give an overview of some of the recent developments of molecular engineering towards this goal. Inorganic surface specific proteins were identified by using cell surface and phage display technologies. Examples of metal and metal oxide specific polypeptides were represented with an emphasis on certain level of specificities. The recognition and self assembling characteristics of these inorganic-binding proteins would be employed in develeopment of hybrid multifunctional materials for novel bio- and nano-technological applications.

New Work on Speech Acts

2018 ◽  
Keyword(s):  
Speech Acts ◽  
Speech Act ◽  
Speech Act Theory ◽  
New Work ◽  
Half Century ◽  
Recent Advances ◽  
Current Thinking ◽  
Semantics And Pragmatics ◽  
Recent Developments ◽  
The Relationship

The essays collected in this book represent recent advances in our understanding of speech acts-actions like asserting, asking, and commanding that speakers perform when producing an utterance. The study of speech acts spans disciplines, and embraces both the theoretical and scientific concerns proper to linguistics and philosophy as well as the normative questions that speech acts raise for our politics, our societies, and our ethical lives generally. It is the goal of this book to reflect the diversity of current thinking on speech acts as well as to bring these conversations together, so that they may better inform one another. Topics explored in this book include the relationship between sentence grammar and speech act potential; the fate of traditional frameworks in speech act theory, such as the content-force distinction and the taxonomy of speech acts; and the ways in which speech act theory can illuminate the dynamics of hostile and harmful speech. The book takes stock of well over a half century of thinking about speech acts, bringing this classicwork in linewith recent developments in semantics and pragmatics, and pointing the way forward to further debate and research.

A comprehensive overview and recent advances on polyhydroxyalkanoates (PHA) production using various organic waste streams

2021 ◽  
Vol 325 ◽  
pp. 124685
Author(s):  
Rijuta Ganesh Saratale ◽  
Si-Kyung Cho ◽  
Ganesh Dattatraya Saratale ◽  
Avinash A. Kadam ◽  
Gajanan S. Ghodake ◽  
...  
Keyword(s):  
Organic Waste ◽  
Waste Streams ◽  
Comprehensive Overview ◽  
Recent Advances ◽  
Pha Production

scholarly journals Recent Advances in Rapid Synthesis of Non-proteinogenic Amino Acids from Proteinogenic Amino Acids Derivatives via Direct Photo-Mediated C–H Functionalization

Molecules ◽  
2020 ◽  
Vol 25 (22) ◽  
pp. 5270
Author(s):  
Zhenbo Yuan ◽  
Xuanzhong Liu ◽  
Changmei Liu ◽  
Yan Zhang ◽  
Yijian Rao
Keyword(s):  
Amino Acids ◽  
Direct Synthesis ◽  
Environmentally Friendly ◽  
Powerful Method ◽  
Rapid Synthesis ◽  
Conservation Of Energy ◽  
Mild Conditions ◽  
Recent Advances ◽  
Recent Developments

Non-proteinogenic amino acids have attracted tremendous interest for their essential applications in the realm of biology and chemistry. Recently, rising C–H functionalization has been considered an alternative powerful method for the direct synthesis of non-proteinogenic amino acids. Meanwhile, photochemistry has become popular for its predominant advantages of mild conditions and conservation of energy. Therefore, C–H functionalization and photochemistry have been merged to synthesize diverse non-proteinogenic amino acids in a mild and environmentally friendly way. In this review, the recent developments in the photo-mediated C–H functionalization of proteinogenic amino acids derivatives for the rapid synthesis of versatile non-proteinogenic amino acids are presented. Moreover, postulated mechanisms are also described wherever needed.

scholarly journals Recent developments in voltammetric and amperometric sensors for cysteine detection

RSC Advances ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 5411-5425
Author(s):  
Somayeh Tajik ◽  
Zahra Dourandish ◽  
Peyman Mohammadzadeh Jahani ◽  
Iran Sheikhshoaie ◽  
Hadi Beitollahi ◽  
...  
Keyword(s):  
Review Article ◽  
Amperometric Sensors ◽  
Recent Advances ◽  
Recent Developments ◽  
Amperometric Sensing

This review article aims to provide an overview of the recent advances in the voltammetric and amperometric sensing of cysteine (Cys).

Recent advances and new concepts for the synthesis of axially stereoenriched biaryls

2015 ◽  
Vol 44 (11) ◽  
pp. 3418-3430 ◽  
Author(s):  
J. Wencel-Delord ◽  
A. Panossian ◽  
F. R. Leroux ◽  
F. Colobert
Keyword(s):  
Chiral Compounds ◽  
The Past ◽  
Recent Advances ◽  
New Concepts ◽  
Axially Chiral ◽  
Recent Developments ◽  
Synthetic Routes

Over the past decade the field of the synthesis of axially chiral compounds has been rapidly expanding. Not only key advances have been achieved concerning the already established strategies but also new synthetic routes have been devised. This review showcases the recent developments in this domain.

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