Log in

Relevant bibliographies by topics / Cross Reactions / Journal articles

To see the other types of publications on this topic, follow the link: Cross Reactions.

Journal articles on the topic 'Cross Reactions'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 April 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Cross Reactions.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Pires, Marina, Sara Purificação, A. Santos, and M. Marques. "The Role of PEG on Pd- and Cu-Catalyzed Cross-Coupling Reactions." Synthesis 49, no. 11 (April 26, 2017): 2337–50. http://dx.doi.org/10.1055/s-0036-1589498.

Full text

Abstract:

Carbon–carbon and carbon–heteroatom coupling reactions are among the most important transformations in organic synthesis as they enable complex structures to be formed from readily available compounds under different routes and conditions. Several metal-catalyzed cross-coupling reactions have been developed creating many efficient methods accessible for the direct formation of new bonds between differently hybridized carbon atoms.During the last decade, much effort has been devoted towards improvement of the sustainability of these reactions, such as catalyst recovery and atom efficiency. Polyethylene glycol (PEG) can be used as a medium, as solid-liquid phase transfer catalyst, or even as a polymer support. PEG has been investigated in a wide variety of cross-coupling reactions either as an alternative solvent to the common organic solvents or as a support for catalyst, substrate, and ligand. In this review we will summarize the different roles of PEG in palladium- and copper-catalyzed cross-coupling reactions, with the focus on Heck, Suzuki–Miyaura, Sonogashira, Buchwald–Hartwig, Stille, Fukuyama, and homocoupling reactions. We will highlight the role of PEG, the preparation of PEGylated catalysts and substrates, and the importance for the reaction outcome and applicability.1 Introduction2 PEG in Heck Reactions3 PEG in Homocoupling Reactions4 PEG in Suzuki–Miyaura Reactions5 PEG in Sonogashira Reactions6 PEG in Buchwald–Hartwig Reactions7 PEG in Stille Reactions8 PEG in Fukuyama Reactions9 PEG in Miscellaneous Cross-Coupling Routes10 Conclusions

APA, Harvard, Vancouver, ISO, and other styles

2

Daley, Ryan A., and Joseph J. Topczewski. "Aryl-Decarboxylation Reactions Catalyzed by Palladium: Scope and Mechanism." Synthesis 52, no. 03 (December 13, 2019): 365–77. http://dx.doi.org/10.1055/s-0039-1690769.

Full text

Abstract:

Palladium-catalyzed cross-couplings and related reactions have enabled many transformations essential to the synthesis of pharmaceuticals, agrochemicals, and organic materials. A related family of reactions that have received less attention are decarboxylative functionalization reactions. These reactions replace the preformed organometallic precursor (e.g., boronic acid or organostannane) with inexpensive and readily available carboxylic acids for many palladium-catalyzed reactions. This review focuses on catalyzed reactions where the elementary decarboxylation step is thought to occur at a palladium center. This review does not include decarboxylative reactions where decarboxylation is thought to be facilitated by a second metal (copper or silver) and is specifically limited to (hetero)arenecarboxylic acids. This review includes a discussion of oxidative Heck reactions, protodecarboxylation reactions, and cross-coupling reactions among others.1 Introduction2 Oxidative Heck Reactions3 Protodecarboxylation Reactions4 Cross-Coupling Reactions5 Other Reactions6 Conclusion

APA, Harvard, Vancouver, ISO, and other styles

3

Koóš, Peter, Martin Markovič, Pavol Lopatka, and Tibor Gracza. "Recent Applications of Continuous Flow in Homogeneous Palladium Catalysis." Synthesis 52, no. 23 (August 3, 2020): 3511–29. http://dx.doi.org/10.1055/s-0040-1707212.

Full text

Abstract:

Considerable advances have been made using continuous flow chemistry as an enabling tool in organic synthesis. Consequently, the number of articles reporting continuous flow methods has increased significantly in recent years. This review covers the progress achieved in homogeneous palladium catalysis using continuous flow conditions over the last five years, including C–C/C–N cross-coupling reactions, carbonylations and reductive/oxidative transformations.1 Introduction2 C–C Cross-Coupling Reactions3 C–N Coupling Reactions4 Carbonylation Reactions5 Miscellaneous Reactions6 Key to Schematic Symbols7 Conclusion

APA, Harvard, Vancouver, ISO, and other styles

4

Staubitz, Anne, Melanie Walther, Waldemar Kipke, Sven Schultzke, and Souvik Ghosh. "Modification of Azobenzenes by Cross-Coupling Reactions." Synthesis 53, no. 07 (January 28, 2021): 1213–28. http://dx.doi.org/10.1055/s-0040-1705999.

Full text

Abstract:

AbstractAzobenzenes are among the most extensively used molecular switches for many different applications. The need to tailor them to the required task often requires further functionalization. Cross-coupling reactions are ideally suited for late-stage modifications. This review provides an overview of recent developments in the modification of azobenzene and its derivatives by cross-coupling reactions.1 Introduction2 Azobenzenes as Formally Electrophilic Components2.1 Palladium Catalysis2.2 Nickel Catalysis2.3 Copper Catalysis2.4 Cobalt Catalysis3 Azobenzenes as Formally Nucleophilic Components3.1 Palladium Catalysis3.2 Copper Catalysis3.3 C–H Activation Reactions4 Azobenzenes as Ligands in Catalysts5 Diazocines5.1 Synthesis5.2 Cross-Coupling Reactions6 Conclusion

APA, Harvard, Vancouver, ISO, and other styles

5

Akkarasamiyo, Sunisa, Somsak Ruchirawat, Poonsaksi Ploypradith, and Joseph S. M. Samec. "Transition-Metal-Catalyzed Suzuki–Miyaura-Type Cross-Coupling Reactions of π-Activated Alcohols." Synthesis 52, no. 05 (January 7, 2020): 645–59. http://dx.doi.org/10.1055/s-0039-1690740.

Full text

Abstract:

The Suzuki–Miyaura reaction is one of the most powerful tools for the formation of carbon–carbon bonds in organic synthesis. The utilization of alcohols in this powerful reaction is a challenging task. This short review covers progress in the transition-metal-catalyzed Suzuki–Miyaura-type cross-coupling reaction of π-activated alcohol, such as aryl, benzylic, allylic, propargylic and allenic alcohols, between 2000 and June 2019.1 Introduction2 Suzuki–Miyaura Cross-Coupling Reactions of Aryl Alcohols2.1 One-Pot Reactions with Pre-activation of the C–O Bond2.1.1 Palladium Catalysis2.1.2 Nickel Catalysis2.2 Direct Activation of the C–O Bond2.2.1 Nickel Catalysis3 Suzuki–Miyaura-Type Cross-Coupling Reactions of Benzylic Alcohols4 Suzuki–Miyaura-Type Cross-Coupling Reactions of Allylic Alcohols4.1 Rhodium Catalysis4.2 Palladium Catalysis4.3 Nickel Catalysis4.4 Stereospecific Reactions4.5 Stereoselective Reactions4.6 Domino Reactions5 Suzuki–Miyaura-Type Cross-Coupling Reactions of Propargylic Alcohols5.1 Palladium Catalysis5.2 Rhodium Catalysis6 Suzuki–Miyaura-Type Cross-Coupling Reactions of Allenic Alcohols6.1 Palladium Catalysis6.2 Rhodium Catalysis7 Conclusions

APA, Harvard, Vancouver, ISO, and other styles

6

Bolm, Carsten. "Cross-Coupling Reactions." Journal of Organic Chemistry 77, no. 12 (June 15, 2012): 5221–23. http://dx.doi.org/10.1021/jo301069c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Bolm, Carsten. "Cross-Coupling Reactions." Organic Letters 14, no. 12 (June 15, 2012): 2925–28. http://dx.doi.org/10.1021/ol301436v.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Li, Jie, and Paul Knochel. "Chromium-Catalyzed Cross-Couplings and Related Reactions." Synthesis 51, no. 10 (March 21, 2019): 2100–2106. http://dx.doi.org/10.1055/s-0037-1611756.

Full text

Abstract:

Transition-metal-catalyzed cross-couplings have been recognized as a powerful tool for sustainable syntheses. Despite the fact that remarkable progress was achieved by palladium and nickel catalysis, the high price and toxicity still remained a drawback. Recently, naturally more abundant and less toxic low-valent chromium salts, such as Cr(II) and Cr(III) chlorides, displayed notable unique catalytic reactivity. Thus, recent progress in the field of chromium-catalyzed cross-couplings and related reactions are highlighted in the present short review until December 2018.1 Introduction and Early Chromium-Mediated Reactions2 Chromium-Catalyzed Cross-Couplings and Related Reactions3 Conclusion

APA, Harvard, Vancouver, ISO, and other styles

9

Verner, Jiří, and Milan Potáček. "Aromatic glyoxalimines in criss-cross cycloaddition reactions." Open Chemistry 2, no. 1 (March 1, 2004): 220–33. http://dx.doi.org/10.2478/bf02476192.

Full text

Abstract:

AbstractAromatic 1,4-diazabuta-1,3-dienes in glacial acetic acid with thiocyanates produce via criss-cross cycloaddition reactions the corresponding perhydroimidazo[4,5-d]imidazole-2,5-dithiones. When a mixture of thiocyanate and cyanate in a proper ratio was reacted together, nonsymmetrical 5-thioxo-perhydroimidazo[4,5-d]imidazole-2-ones were isolated. With cyanates substituted aromatic 1,4-diazabuta-1,3-dienes afforded product of acetic acid addition to primary formed 1,3-dipole intermediate 5-(4-substituted phenylamino)-3-(4-substituted phenyl)-2-oxoimidazolidin-4-yl acetate.

APA, Harvard, Vancouver, ISO, and other styles

10

Galeta, Juraj, Stanislav Man, Aneta Valoušková, and Milan Potáček. "Homoallenyl azines in criss-cross cycloaddition reactions." Monatshefte für Chemie - Chemical Monthly 144, no. 2 (November 7, 2012): 205–16. http://dx.doi.org/10.1007/s00706-012-0865-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Malla, Raj K., Jeremy N. Ridenour, and Christopher D. Spilling. "Relay cross metathesis reactions of vinylphosphonates." Beilstein Journal of Organic Chemistry 10 (August 19, 2014): 1933–41. http://dx.doi.org/10.3762/bjoc.10.201.

Full text

Abstract:

Dimethyl (β-substituted) vinylphosphonates do not readily undergo cross metathesis reactions with Grubbs catalyst and terminal alkenes. However, the corresponding mono- or diallyl vinylphosphonate esters undergo facile cross metathesis reactions. The improved reactivity is attributed to a relay step in the cross metathesis reaction mechanism.

APA, Harvard, Vancouver, ISO, and other styles

12

Kotha, Sambasivarao, Milind Meshram, and Nageswara Panguluri. "Advanced Approaches to Post-Assembly Modification of Peptides by Transition-Metal-Catalyzed Reactions." Synthesis 51, no. 09 (March 25, 2019): 1913–22. http://dx.doi.org/10.1055/s-0037-1612418.

Full text

Abstract:

We have summarized diverse synthetic approaches for the modification of peptides by employing transition-metal-catalyzed reactions. These methods can deliver unusual peptides suitable for peptidomimetics. To this end, several popular reactions such as Diels–Alder, 1,3-dipolar cycloaddition, [2+2+2] cyclotrimerization, metathesis, Suzuki–Miyaura cross-coupling, and Negishi coupling have been used to assemble modified peptides by post-assembly chemical modification strategies.1 Introduction2 Synthesis of a Cyclic α-Amino Acid Derivative via a Ring-Closing Metathesis Protocol3 Peptide Modification Using a Ring-Closing Metathesis Strategy4 Peptide Modification via a [2+2+2] Cyclotrimerization Reaction5 Peptide Modification by Using [2+2+2] Cyclotrimerization and Suzuki Coupling6 Peptide Modification via a Suzuki–Miyaura Cross-Coupling7 Peptide Modification via Cross-Enyne Metathesis and a Diels–Alder Reaction as Key Steps8 Peptide Modification via 1,3-Dipolar Cycloaddition Reactions9 Modified Peptides via Negishi Coupling10 A Modified Dipeptide via Ethyl Isocyanoacetate11 Conclusions

APA, Harvard, Vancouver, ISO, and other styles

13

Kubota, Koji, and Hajime Ito. "Mechanochemical Cross-Coupling Reactions." Trends in Chemistry 2, no. 12 (December 2020): 1066–81. http://dx.doi.org/10.1016/j.trechm.2020.09.006.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Heidelberger, Michael, Wolfgang Nimmich, Jorunn Eriksen, Guy G. S. Dutton, Stephan Stirm, and Chyang T. Fang. "CROSS-REACTIONS OF KLEBSIELLA." Acta Pathologica Microbiologica Scandinavica Section C Immunology 83C, no. 6 (August 15, 2009): 397–405. http://dx.doi.org/10.1111/j.1699-0463.1975.tb01657.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Scheman, Andrew, Ricky Hipolito, David Severson, and Nineveh Youkhanis. "Contact Allergy Cross-reactions." Dermatitis 28, no. 2 (2017): 128–40. http://dx.doi.org/10.1097/der.0000000000000254.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Vaaland, Ingrid Caroline, and Magne Olav Sydnes. "Consecutive Palladium Catalyzed Reactions in One-Pot Reactions." Mini-Reviews in Organic Chemistry 17, no. 5 (August 11, 2020): 559–69. http://dx.doi.org/10.2174/1570193x16666190716150048.

Full text

Abstract:

Combining palladium catalyzed reactions in one-pot reactions represents an efficient and economical use of catalyst. The Suzuki-Miyaura cross-coupling has been proven to be a reaction which can be combined with other palladium catalyzed reactions in the same pot. This mini-review will highlight some of the latest examples where Suzuki-Miyaura cross-coupling reactions have been combined with other palladium catalyzed reactions in one-pot reaction. Predominantly, examples with homogeneous reaction conditions will be discussed in addition to a few examples from the authors where Pd/C have been used as a catalyst.

APA, Harvard, Vancouver, ISO, and other styles

17

Kourlas, Helen, and Susan Morey. "Sulfonamide Allergy and Possible Cross-Reactivity." Journal of Pharmacy Practice 20, no. 5 (October 2007): 399–402. http://dx.doi.org/10.1177/0897190007305686.

Full text

Abstract:

True allergic reactions are IgE-mediated immune reactions and are also termed type I reactions, where the spectrum of presentation may range from urticaria to severe anaphylactic shock. Currently, 3% of the patients who use sulfonamide antibiotics develop an allergic reaction, with the most common being the development of a maculopapular rash. Sulfonamides are chemical compounds that can be further divided into 3 groups based on differences in their structural makeup. Several cases reviewing the cross-reactivity between sulfonamide antibiotics and nonantibiotics have suggested an increased risk of cross-reactivity and therefore recommend other treatment strategies to avoid a possible anaphylactic reaction; however, other reports argue that patients with a history of sulfonamide allergy who received sulfonamide nonantibiotics did not experience any adverse reactions. Pertinent data extracted from these studies are reviewed and evaluated.

APA, Harvard, Vancouver, ISO, and other styles

18

Sarabia, Francisco, and Iván Cheng-Sánchez. "Recent Advances in Total Synthesis via Metathesis Reactions." Synthesis 50, no. 19 (July 18, 2018): 3749–86. http://dx.doi.org/10.1055/s-0037-1610206.

Full text

Abstract:

The metathesis reactions, in their various versions, have become a powerful and extremely valuable tool for the formation of carbon–carbon bonds in organic synthesis. The plethora of available catalysts to perform these reactions, combined with the various transformations that can be accomplished, have positioned the metathesis processes as one of the most important reactions of this century. In this review, we highlight the most relevant synthetic contributions published between 2012 and early 2018 in the field of total synthesis, reflecting the state of the art of this chemistry and demonstrating the significant synthetic potential of these methodologies.1 Introduction2 Alkene Metathesis in Total Synthesis2.1 Total Synthesis Based on a Ring-Closing-Metathesis Reaction2.2 Total Synthesis Based on a Cross-Metathesis Reaction2.3 Strategies for Selective and Efficient Metathesis Reactions of Alkenes2.3.1 Temporary Tethered Ring-Closing Metathesis2.3.2 Relay Ring-Closing Metathesis2.3.3 Stereoselective Alkene Metathesis2.3.4 Alkene Metathesis in Tandem Reactions3 Enyne Metathesis in Total Synthesis3.1 Total Syntheses Based on a Ring-Closing Enyne-Metathesis Reaction3.2 Total Syntheses Based on an Enyne Cross-Metathesis Reaction3.3 Enyne Metathesis in Tandem Reactions4 Alkyne Metathesis in Total Synthesis4.1 Total Synthesis Based on a Ring-Closing Alkyne-Metathesis Reaction4.2 Other Types of Alkyne-Metathesis Reactions5 Conclusions

APA, Harvard, Vancouver, ISO, and other styles

19

Galeta, Juraj, Stanislav Man, Aneta Valouskova, and Milan Potacek. "ChemInform Abstract: Homoallenyl Azines in Criss-Cross Cycloaddition Reactions." ChemInform 44, no. 21 (May 2, 2013): no. http://dx.doi.org/10.1002/chin.201321152.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Pérez Sestelo, José, and Luis A. Sarandeses. "Advances in Cross-Coupling Reactions." Molecules 25, no. 19 (October 1, 2020): 4500. http://dx.doi.org/10.3390/molecules25194500.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Dong, Kui, Qiang Liu, and Li-Zhu Wu. "Cross-Coupling Hydrogen Evolution Reactions." Acta Chimica Sinica 78, no. 4 (2020): 299. http://dx.doi.org/10.6023/a19110412.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Suzuki, Akira. "Cross-coupling reactions via organoboranes." Journal of Organometallic Chemistry 653, no. 1-2 (July 2002): 83–90. http://dx.doi.org/10.1016/s0022-328x(02)01269-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Shirakawa, Eiji. "Electron-Catalyzed Cross-Coupling Reactions." Journal of Synthetic Organic Chemistry, Japan 77, no. 5 (May 1, 2019): 433–41. http://dx.doi.org/10.5059/yukigoseikyokaishi.77.433.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Cahiez, Gérard, and Alban Moyeux. "Cobalt-Catalyzed Cross-Coupling Reactions." Chemical Reviews 110, no. 3 (March 10, 2010): 1435–62. http://dx.doi.org/10.1021/cr9000786.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Jerez, J., F. Rodriguez, I. Jimenez, and D. Martín-Gill. "Cross-reactions between aminoside antibiotics." Contact Dermatitis 17, no. 5 (November 1987): 325. http://dx.doi.org/10.1111/j.1600-0536.1987.tb01494.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Rudzki, E., Z. Zakrzewski, P. Rebandel, Z. Grzywa, and W. Hudymowicz. "Cross reactions between aminoglycoside antibiotics." Contact Dermatitis 18, no. 5 (May 1988): 314–16. http://dx.doi.org/10.1111/j.1600-0536.1988.tb02851.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Fürstner, Alois, Andreas Leitner, María Méndez, and Helga Krause. "Iron-Catalyzed Cross-Coupling Reactions." Journal of the American Chemical Society 124, no. 46 (November 2002): 13856–63. http://dx.doi.org/10.1021/ja027190t.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Gosmini, Corinne, Jeanne-Marie Bégouin, and Aurélien Moncomble. "Cobalt-catalyzed cross-coupling reactions." Chemical Communications, no. 28 (2008): 3221. http://dx.doi.org/10.1039/b805142a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Stüer, Rainer. "Metal-Catalyzed Cross-Coupling Reactions." Advanced Synthesis & Catalysis 347, no. 1 (January 2005): 197. http://dx.doi.org/10.1002/adsc.200404362.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Hayashi, Tamio. "ChemInform Abstract: Cross-Coupling Reactions." ChemInform 31, no. 18 (June 8, 2010): no. http://dx.doi.org/10.1002/chin.200018235.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Lee, Andrew, Chu Yeong Lim, and Tracey Chunqi Zhang. "Cross-quarter differential market reactions." Pacific Accounting Review 28, no. 2 (April 4, 2016): 219–35. http://dx.doi.org/10.1108/par-07-2015-0030.

Full text

Abstract:

Purpose The purpose of this paper is to investigate the audit effect hypothesis for the cross-quarter differential market reactions to earnings announcements. Design/methodology/approach Earnings response coefficients are focused upon as indicators of perceived earnings quality. Findings The evidence suggests that investors of Singapore listed companies respond more strongly to earnings announcements in the fourth quarter than other interim quarters. The findings support the notion that investors attach different degrees of reliability to interim quarter earnings relative to final quarter earnings. Originality/value Findings in this paper shed new light on the audit effect hypothesis and are relevant to accounting regulators and audit committee members seeking to enhance the credibility of earnings announcements.

APA, Harvard, Vancouver, ISO, and other styles

32

Varga, Janos M., Gertrud Kalchschmid, Blanche Bellon, J. Kuhn, P. Druet, and Peter Fritsch. "Mechanism of Allergic Cross-Reactions." International Archives of Allergy and Immunology 108, no. 2 (1995): 196–99. http://dx.doi.org/10.1159/000237139.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Kittisupamongkol, Weekitt. "Lower Incidence of Cross-reactions." American Journal of Medicine 121, no. 12 (December 2008): e11. http://dx.doi.org/10.1016/j.amjmed.2008.06.022.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Beletskaya, Irina P., and Andrei V. Cheprakov. "Copper in cross-coupling reactions." Coordination Chemistry Reviews 248, no. 21-24 (December 2004): 2337–64. http://dx.doi.org/10.1016/j.ccr.2004.09.014.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Kashihara, Myuto, and Yoshiaki Nakao. "Cross-Coupling Reactions of Nitroarenes." Accounts of Chemical Research 54, no. 14 (July 7, 2021): 2928–35. http://dx.doi.org/10.1021/acs.accounts.1c00220.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Wang, Chuan, and Youxiang Jin. "Nickel-Catalyzed Asymmetric Cross-Electrophile Coupling Reactions." Synlett 31, no. 19 (July 27, 2020): 1843–50. http://dx.doi.org/10.1055/s-0040-1707216.

Full text

Abstract:

The merger of cross-electrophile coupling and asymmetric catalysis provides a novel approach to the preparation of optically active compounds. This method is often endowed with high step economy, mild conditions, and excellent tolerance of functional groups. Recent advances in the research field of nickel-catalyzed asymmetric cross-electrophile coupling reactions are highlighted in this concise Synpacts article.1 Introduction2 Asymmetric Cross-Electrophile Coupling Reactions between Organohalides3 Asymmetric Electrophilic Ring-Opening Reactions4 Asymmetric Electrophilic Difunctionalization of Alkenes4.1 Two-Component Electrophilic Difunctionalization of Alkenes Involving Arylnickelation as an Enantiodetermining Step4.2 Two-Component Electrophilic Difunctionalization of Alkenes Involving Carbamoylnickelation as an Enantiodetermining Step4.3 Three-Component Electrophilic Difunctionalization of Alkenes5 Asymmetric Electrophilic Functionalization of Carbonyl Compounds6 Summary

APA, Harvard, Vancouver, ISO, and other styles

37

Larson, Gerald. "Some Aspects of the Chemistry of Alkynylsilanes." Synthesis 50, no. 13 (May 18, 2018): 2433–62. http://dx.doi.org/10.1055/s-0036-1591979.

Full text

Abstract:

In amongst the considerable chemistry of acetylenes there lies some unique chemistry of alkynylsilanes (silylacetylenes) some of which is reviewed herein. This unique character is exemplified not only in the silyl protection of the terminal C–H of acetylenes, but also in the ability of the silyl group to be converted into other functionalities after reaction of the alkynylsilane and to its ability to dictate and improve the regioselectivity of reactions at the triple bond. This, when combined with the possible subsequent transformations of the silyl group, makes their chemistry highly versatile and useful.1 Introduction2 Safety3 Synthesis4 Protiodesilylation5 Sonogashira Reactions6 Cross-Coupling with the C–Si Bond7 Stille Cross-Coupling8 Reactions at the Terminal Carbon9 Cross-Coupling with Silylethynylmagnesium Bromides10 Reactions of Haloethynylsilanes11 Cycloaddition Reactions11.1 Formation of Aromatic Rings11.2 Diels–Alder Cyclizations11.3 Formation of Heterocycles11.4 Formation of 1,2,3-Triazines11.5 [2+3] Cycloadditions11.6 Other Cycloadditions12 Additions to the C≡C Bond13 Reactions at the C–Si Bond14 Miscellaneous Reactions

APA, Harvard, Vancouver, ISO, and other styles

38

Odell, Luke, Mats Larhed, and Linda Åkerbladh. "Palladium-Catalyzed Molybdenum Hexacarbonyl-Mediated Gas-Free Carbonylative Reactions." Synlett 30, no. 02 (October 2, 2018): 141–55. http://dx.doi.org/10.1055/s-0037-1610294.

Full text

Abstract:

This account summarizes Pd(0)-catalyzed Mo(CO)6-mediated gas-free carbonylative reactions published in the period October 2011 to May 2018. Presented reactions include inter- and intramolecular carbonylations, carbonylative cross-couplings, and carbonylative multicomponent reactions using Mo(CO)6 as a solid source of CO. The presented methodologies were developed mainly for small-scale applications, avoiding the problematic use of gaseous CO in a standard laboratory. In most cases, the reported Mo(CO)6-mediated carbonylations were conducted in sealed vials or by using two-chamber solutions.1 Introduction2 Recent Developments2.1 New CO Sources2.2 Two-Chamber System for ex Situ CO Generation2.3 Multicomponent Carbonylations3 Carbonylations with N and O Nucleophiles4 Carbonylative Cross-Coupling Reactions with Organometallics5 Carbonylative Cascade Reactions6 Carbonylative Cascade, Multistep Reactions7 Summary and Outlook

APA, Harvard, Vancouver, ISO, and other styles

39

Baldo, B. A. "Cross-reactions of neuromuscular blocking drugs and anaphylactoid reactions." Anaesthesia 41, no. 5 (May 1986): 550–51. http://dx.doi.org/10.1111/j.1365-2044.1986.tb13287.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Haan, P., and W. G. Ketel. "Specific reactions and cross reactions of anti-penicilloyl antibodies." Allergy 42, no. 2 (February 1987): 92–96. http://dx.doi.org/10.1111/j.1398-9995.1987.tb02365.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Ujwaldev, Sankuviruthiyil M., K. R. Rohit, Sankaran Radhika, and Gopinathan Anilkumar. "Sonochemistry in Transition Metal Catalyzed Cross-coupling Reactions: Recent Developments." Current Organic Chemistry 23, no. 28 (January 17, 2020): 3137–53. http://dx.doi.org/10.2174/1385272823666191118103844.

Full text

Abstract:

: Transition metal catalyzed cross-coupling reactions have always been very important in synthetic organic chemistry due to their versatility in forming all sorts of carbon-carbon and carbon-hetero atom bonds. Incorporation of ultrasound assistance to these protocols resulted in milder reaction conditions, faster reaction rates, etc. This review focuses on the contributions made by ultrasound-assisted protocols towards transition metal catalyzed crosscoupling reactions.

APA, Harvard, Vancouver, ISO, and other styles

42

Ma, Nanru, Chengjian Lin, Huiming Jia, Xinxing Xu, Feng Yang, Lei Yang, Lijie Sun, Dongxi Wang, Huanqiao Zhang, and Zuhua Liu. "Measurement of (n, f) and (n, xn) cross sections with surrogate reaction method." EPJ Web of Conferences 239 (2020): 01007. http://dx.doi.org/10.1051/epjconf/202023901007.

Full text

Abstract:

Surrogate reaction method is an important approach to overcome the difficulties meet in the direct measurement of neutron induced nuclear reaction. The current existing surrogate reactions generally employ the peripheral reactions such as inelastic excitation and transfer reaction where the involved angular momenta are much larger than the neutron capture reaction, which causes a difficulty in theoretical correction of spin of compound nucleus. We proposed to use capture reaction of light charged particle as the surrogate reaction, thus the spin distributions of compound nucleus in two reactions are quite similar and therefore the spin correction is not strongly desired. Based on this idea, the 239Pu(n, f) and (n, 2n) cross sections were successfully extracted by using 236U(α,, f) and (α, 2n) reactions as the surrogate reactions. The well coincidence of the present results with the data of ENDFB7 within the error bars shows the reliability of the proposed surrogate capture reaction method.

APA, Harvard, Vancouver, ISO, and other styles

43

Sosnovskikh, Vyacheslav Y. "Synthesis and Reactivity of Electron-Deficient 3-Vinylchromones." SynOpen 05, no. 03 (August 17, 2021): 255–77. http://dx.doi.org/10.1055/a-1589-9556.

Full text

Abstract:

AbstractThe reported methods and data for the synthesis and reactivity of electron-deficient 3-vinylchromones containing electron-withdrawing groups at the exo-cyclic double bond are summarized and systematized for the first time. The main methods for obtaining these compounds are Knoevenagel condensation, Wittig reaction, and palladium-catalyzed cross-couplings. The most important chemical properties are transformations under the action of mono- and dinucleophiles, ambiphilic cyclizations, and cycloaddition reactions. The cross-conjugated and polyelectrophilic dienone system in 3-vinylchromones provides their high reactivity and makes these compounds valuable building blocks for the preparation of more complex heterocyclic systems. Chemical transformations of 3-vinylchromones usually begin with an attack of the C-2 atom and are accompanied by the opening of the pyrone ring followed by recyclization, in which the carbonyl group of chromone, an exo-double bond or a substituent on it can take part. The mechanisms of the reactions are discussed, the conditions for their implementation are described, and the yields of the resulting products are given. This review focuses on an analysis and generalization of the knowledge that has accumulated on the chemistry of electron-deficient 3-vinylchromones, mostly over the past 15 years.1 Introduction2 Synthesis of 3-Vinylchromones3 Reactions with Mononucleophiles4 Reactions with Dinucleophiles5 Ambiphilic Cyclization6 Cycloaddition Reactions7 Other Reactions8 Conclusion

APA, Harvard, Vancouver, ISO, and other styles

44

Lumb, Jean-Philip, and Kenneth Esguerra. "Cu(III)-Mediated Aerobic Oxidations." Synthesis 51, no. 02 (December 3, 2018): 334–58. http://dx.doi.org/10.1055/s-0037-1609635.

Full text

Abstract:

CuIII species have been invoked in many copper-catalyzed transformations including cross-coupling reactions and oxidation reactions. In this review, we will discuss seminal discoveries that have advanced our understanding of the CuI/CuIII redox cycle in the context of C–C and C–heteroatom aerobic cross-coupling reactions, as well as C–H oxidation reactions mediated by CuIII–dioxygen adducts.1 General Introduction2 Early Examples of CuIII Complexes3 Aerobic CuIII-Mediated Carbon–Heteroatom Bond-Forming Reactions4 Aerobic CuIII-Mediated Carbon–Carbon Bond-Forming Reactions5 Bioinorganic Studies of CuIII Complexes from CuI and O2 5.1 O2 Activation5.2 Biomimetic CuIII Complexes from CuI and Dioxygen5.2.1 Type-3 Copper Enzymes and Dinuclear Cu Model Complexes5.2.2 Particulate Methane Monooxygenase and Di- and Trinuclear Cu Model Complexes5.2.3 Dopamine–β-Monooxygenase and Mononuclear Cu Model Complexes6 Conclusion

APA, Harvard, Vancouver, ISO, and other styles

45

Maier, Gerhard. "Polymers by 1,3-dipolar cycloaddition reactions: the “criss-cross” cycloaddition." Macromolecular Chemistry and Physics 197, no. 10 (October 1996): 3067–90. http://dx.doi.org/10.1002/macp.1996.021971002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Baqi, Younis. "Recent Advances in Microwave-Assisted Copper-Catalyzed Cross-Coupling Reactions." Catalysts 11, no. 1 (December 31, 2020): 46. http://dx.doi.org/10.3390/catal11010046.

Full text

Abstract:

Cross-coupling reactions furnishing carbon–carbon (C–C) and carbon–heteroatom (C–X) bond is one of the most challenging tasks in organic syntheses. The early developed reaction protocols by Ullmann, Ullman–Goldberg, Cadiot–Chodkiewicz, Castro–Stephens, and Corey–House, utilizing elemental copper or its salts as catalyst have, for decades, attracted and inspired scientists. However, these reactions were suffering from the range of functional groups tolerated as well as severely restricted by the harsh reaction conditions often required high temperatures (150–200 °C) for extended reaction time. Enormous efforts have been paid to develop and achieve more sustainable reaction conditions by applying the microwave irradiation. The use of controlled microwave heating dramatically reduces the time required and therefore resulting in increase in the yield as well as the efficiency of the reaction. This review is mainly focuses on the recent advances and applications of copper catalyzed cross-coupling generation of carbon–carbon and carbon–heteroatom bond under microwave technology.

APA, Harvard, Vancouver, ISO, and other styles

47

DESCOUVEMONT, PIERRE. "CROSS SECTIONS FOR NUCLEAR ASTROPHYSICS." International Journal of Modern Physics E 17, no. 10 (November 2008): 2165–70. http://dx.doi.org/10.1142/s0218301308011288.

Full text

Abstract:

General properties of low-energy cross sections and of reaction rates are presented. We describe different models used in nuclear astrophysics: microscopic models, the potential model, and the R-matrix method. Two important reactions, 7 Be ( p ,γ)8 B and 12 C (α,γ)16 O , are then briefly discussed.

APA, Harvard, Vancouver, ISO, and other styles

48

Franzén, Robert, and Youjun Xu. "Review on green chemistry Suzuki cross coupling in aqueous media." Canadian Journal of Chemistry 83, no. 3 (March 1, 2005): 266–72. http://dx.doi.org/10.1139/v05-048.

Full text

Abstract:

The Suzuki cross-coupling reaction is a very efficient, reliable, and environmentally friendly method for the introduction of novel carboncarbon bonds into molecules. This review summarizes recent advances in the use of the reaction in aqueous media with a focus on different types of ligands and the ligandless protocols currently in use. Several synthetic targets for the reaction have been mentioned. The work summarizes recent results from studies on asymmetric Suzuki reactions performed in organic aqueous mixed solvents.Key words: Suzuki reaction, green chemistry, metal-catalyzed cross-coupling reactions, aqueous synthesis media.

APA, Harvard, Vancouver, ISO, and other styles

49

Austin, Sam M., N. Anantaraman, and J. S. Winfield. "Heavy-ion reactions as spin probes." Canadian Journal of Physics 65, no. 6 (June 1, 1987): 609–13. http://dx.doi.org/10.1139/p87-086.

Full text

Abstract:

Heavy-ion reactions can be powerful probes for spin-transfer strength in nuclei, provided their reaction mechanism is simple so that a correlation can be established between cross sections and the relevant matrix elements. We discuss the desirable features of heavy-ion reactions in general and a series of tests of reaction mechanisms that have been carried out for two of the most favorable reactions; (6Li, 6He) and (12C, 12N). We establish that the (6Li, 6He) reaction is one-step in nature above 25 MeV∙nucleon−1 and establish a calibration function relating cross sections and Gamow–Teller matrix elements. We also find that the (12C, 12N) reaction is likely to be dominated by the one-step process above about 50 MeV∙nucleon−1.

APA, Harvard, Vancouver, ISO, and other styles

50

Li, Chao-Jun, Jianlin Huang, Xi-Jie Dai, Haining Wang, Ning Chen, Wei Wei, Huiying Zeng, et al. "An Old Dog with New Tricks: Enjoin Wolff–Kishner Reduction for Alcohol Deoxygenation and C–C Bond Formations." Synlett 30, no. 13 (June 13, 2019): 1508–24. http://dx.doi.org/10.1055/s-0037-1611853.

Full text

Abstract:

The Wolff–Kishner reduction, discovered in the early 1910s, is a fundamental and effective tool to convert carbonyls into methylenes via deoxygenation under strongly basic conditions. For over a century, numerous valuable chemical products have been synthesized by this classical method. The reaction proceeds via the reversible formation of hydrazone followed by deprotonation with the strong base to give an N-anionic intermediate, which affords the deoxygenation product upon denitrogenation and protonation. By examining the mechanistic pathway of this century old classical carbonyl deoxygenation, we envisioned and subsequently developed two unprecedented new types of chemical transformations: a) alcohol deoxygenation and b) C–C bond formations with various electrophiles including Grignard-type reaction, conjugate addition, olefination, and diverse cross-coupling reactions.1 Introduction2 Background3 Alcohol Deoxygenation3.1 Ir-Catalyzed Alcohol Deoxygenation3.2 Ru-Catalyzed Alcohol Deoxygenation3.3 Mn-Catalyzed Alcohol Deoxygenation4 Grignard-Type Reactions4.1 Ru-Catalyzed Addition of Hydrazones with Aldehydes and Ketones4.2 Ru-Catalyzed Addition of Hydrazone with Imines4.3 Ru-Catalyzed Addition of Hydrazone with CO2 4.4 Fe-Catalyzed Addition of Hydrazones5 Conjugate Addition Reactions5.1 Ru-Catalyzed Conjugate Addition Reactions5.2 Fe-Catalyzed Conjugate Addition Reactions6 Cross-Coupling Reactions6.1 Ni-Catalyzed Negishi-type Coupling6.2 Pd-Catalyzed Tsuji–Trost Alkylation Reaction7 Other Reactions7.1 Olefination7.2 Heck-Type Reaction7.3 Ullmann-Type Reaction8 Conclusion and Outlook

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!