Stefani, Helio: search on Z-Library

The world's largest scientific articles store. 70,000,000+ articles for free.

Don't use scam websites

1

Ultrasound in heterocycles chemistry

Rodrigo Cella, Hélio A. Stefani

Journal:

Year:

2009

Language:

english

File:

PDF, 2.03 MB

english, 2009

2

Negishi cross-coupling of organotellurium compounds: synthesis of biaryls, aryl-, and diaryl acetylenes

Hélio A. Stefani, Jesus M. Pena, Flávia Manarin, Rômulo A. Ando, Daiana M. Leal, Nicola Petragnani

Journal:

Tetrahedron Letters

Year:

2011

Language:

english

File:

PDF, 1.81 MB

english, 2011

3

Study of the Regioselectivity in the Hydrotelluration of Hydroxy Alkynes

Stefani, HÉLio A., Cardoso, Lincoln D.G., Valduga, ClaudÉTe J., Zeni, Gilson

Journal:

Phosphorus Sulfur and Silicon and the Related Elements

Year:

2001

Language:

english

File:

PDF, 163 KB

english, 2001

4

A new methodology for the visualization of latent fingermarks on the sticky side of adhesive tapes using novel fluorescent dyes

Barros, Hélio L., Stefani, Valter

Journal:

Forensic Science International

Year:

2016

Language:

english

File:

PDF, 2.86 MB

english, 2016

5

The use of epifluorescence microscopy and fluorescent dyes for visualization of Oxyuris equi eggs

Barros, Hélio L., Marques, Sandra M.T., Stefani, Valter

Journal:

Veterinary Parasitology

Year:

2016

Language:

english

File:

PDF, 1.54 MB

english, 2016

6

Dataset of Nile Red Fluorescence Readings with Different Yeast Strains, Solvents, and Incubation Times

Ramirez-Castrillon, Mauricio, Jaramillo-Garcia, Victoria, Barros, Helio, Henriques, JoÃ£o, Stefani, Valter, Valente, Patricia

Journal:

Year:

2020

File:

PDF, 1.49 MB

2020

7

A New Stereoselective Synthesis of (±)-Grandisol Based on the Remote Alkylation Protocol

Hugo J. Monteiro, Helio A. Stefani

Journal:

European Journal of Organic Chemistry

Year:

2001

Language:

english

File:

PDF, 257 KB

english, 2001

8

A New Stereoselective Synthesis of (±)-Grandisol Based on the Remote Alkylation Protocol

Hugo J. Monteiro, Helio A. Stefani

Journal:

European Journal of Organic Chemistry

Year:

2001

File:

PDF, 76 KB

2001

9

ChemInform Abstract: Seleno- and Telluro-Cyclofunctionalization of α,γ-Diallyl-β-ketoesters: Polysubstituted Furan Derivatives.

Helio A. Stefani, Nicola Petragnani, Carlos A. Brandt, Daniela G. Rando, Claudete J. Valduga

Journal:

Year:

1999

File:

PDF, 33 KB

1999

10

ChemInform Abstract: Synthesis of Polyacetylenic Montiporic Acids A(VI) and B(XII).

Helio A. Stefani, Iguatemi M. Costa, Gilson Zeni

Journal:

Year:

2000

File:

PDF, 27 KB

2000

11

ChemInform Abstract: 3,4-Dihydropyrimidin-2(1H)-ones: Fast Synthesis under Microwave Irradiation in Solvent Free Conditions.

Helio A. Stefani, Paula M. Gatti

Journal:

Year:

2000

File:

PDF, 28 KB

2000

12

ChemInform Abstract: An Easy Synthesis of Enaminones in Water as Solvent.

Helio A. Stefani, Iguatemi M. Costa, Diogo de O. Silva

Journal:

Year:

2001

File:

PDF, 26 KB

2001

13

ChemInform Abstract: Recent Advances in Selenocyclofunctionalization Reactions

Nicola Petragnani, Helio A. Stefani, Claudete J. Valduga

Journal:

Year:

2001

File:

PDF, 24 KB

2001

14

Synthesis of Polyacetylenic Acids (I) and (II) Isolated from Heisteria acuminata.

Gilson Zeni, Rodrigo B. Panatieri, Eliseo Lissner, Paulo H. Menezes, Antonio L. Braga, Helio A. Stefani

Journal:

Year:

2001

File:

PDF, 25 KB

2001

15

ChemInform Abstract: Stereoselective Synthesis of (Z)-Enynes via Pd(II)/CuI(I)-Catalyzed Cross-Coupling Reaction of Bis-vinylic Tellurides with 1-Alkynes.

Gilson Zeni, Paulo H. Menezes, Angelica Venturini Moro, Antonio L. Braga, Claudio C. Silveira, Helio A. Stefani

Journal:

Year:

2001

File:

PDF, 30 KB

2001

16

ChemInform Abstract: Synthesis and Antiinflammatory Activity of Acetylenic Thiophenes.

Gilson Zeni, Cristina W. Nogueira, Rodrigo B. Panatieri, Dagoberto O. Silva, Paulo H. Menezes, Antonio L. Braga, Claudio C. Silveira, Helio A. Stefani, Joao B. T. Rocha

Journal:

Year:

2002

File:

PDF, 27 KB

2002

17

ChemInform Abstract: New Acetylenic Furan Derivatives: Synthesis and Antiinflammatory Activity.

Gilson Zeni, Diogo S. Luedtke, Cristina W. Nogueira, Rodrigo B. Panatieri, Antonio L. Braga, Claudio C. Silveira, Helio A. Stefani, Joao B. T. Rocha

Journal:

Year:

2002

File:

PDF, 29 KB

2002

18

Synthesis of Cross-Conjugated Geminal Enediynes via Palladium-Catalyzed Cross-Coupling Reaction of Ketene Butyltelluroacetals.

Gilson Zeni, Gelson Perin, Rodrigo Cella, Raquel G. Jacob, Antonio L. Braga, Claudio C. Silveira, Helio A. Stefani

Journal:

Year:

2002

File:

PDF, 29 KB

2002

19

Synthesis of 4,5-Dihydropyrroles by Cyclofunctionalization from β-Enamino Esters.

Helio A. Stefani, Elisabete de Avila

Journal:

Year:

2002

File:

PDF, 27 KB

2002

20

Iodocyclofunctionalization of 2,4-Dialkenyl-1,3-dicarbonyl Compounds: Synthesis of Substituted 3-(2-Furylidene)-2-furanones.

Claudete J. Valduga, Helio A. Stefani, Nicola Petragnani

Journal:

Year:

2002

File:

PDF, 29 KB

2002

21

2,5-Bis-(butyltelluro) Thiophene as a Convenient Precursor for the Synthesis of 2,5-Bis-(acetylenic) Thiophenes.

Gilson Zeni, Cristina W. Nogueira, Dagoberto O. Silva, Paulo H. Menezes, Antonio L. Braga, Helio A. Stefani, Joao B. T. Rocha

Journal:

Year:

2003

File:

PDF, 163 KB

2003

22

Palladium(II) Chloride Catalyzes the Cross-Coupling Reaction of 2,5-Bis-(butyltelluro)-furan and 1-Alkynes.

Gilson Zeni, Cristina W. Nogueira, Dagoberto O. Silva, Paulo H. Menezes, Antonio L. Braga, Helio A. Stefani, Joao B. T. Rocha

Journal:

Year:

2003

File:

PDF, 185 KB

2003

23

Sonogashira Cross-Coupling Reaction of Organotellurium Dichlorides with Terminal Alkynes.

Antonio L. Braga, Diogo S. Luedtke, Fabricio Vargas, Ricardo K. Donato, Claudio C. Silveira, Helio A. Stefani, Gilson Zeni

Journal:

Year:

2003

File:

PDF, 116 KB

2003

24

Synthesis of Dihydrofuran Rings Using α-Substituted β-Ketoamides.

Helio A. Stefani, Diogo O. Silva, Iguatemi M. Costa, Nicola Petragnani

Journal:

Year:

2003

File:

PDF, 133 KB

2003

25

Study Toward the Synthesis of Selenofurans via Seleno-Claisen Rearrangement of Allyl Arylselenides.

Helio A. Stefani, Nicola Petragnani, Maria F. C. Ascenso, Gilson Zeni

Journal:

Year:

2003

File:

PDF, 80 KB

2003

26

Palladium-Catalyzed Coupling of sp2-Hybridized Tellurides

Gilson Zeni, Antonio L. Braga, Helio A. Stefani

Journal:

Year:

2004

File:

PDF, 52 KB

2004

27

Stereoselective Preparation of Conjugated E-Enynes from E-Vinylic Tellurides and Terminal Alkynes via Sonogashira Cross-Coupling.

Gilson Zeni, Diego Alves, Jesus M. Pena, Antonio L. Braga, Helio A. Stefani, Cristina W. Nogueira

Journal:

Year:

2004

File:

PDF, 107 KB

2004

28

Hydroselenation of Alkynes by Lithium Butylselenolate: An Approach in the Synthesis of Vinylic Selenides.

Gilson Zeni, Marcelo P. Stracke, Cristina W. Nogueira, Antonio L. Braga, Paulo H. Menezes, Helio A. Stefani

Journal:

Year:

2004

File:

PDF, 177 KB

2004

29

Stereoselective sp2—sp2 Bond Formation via Negishi Cross-Coupling of Vinylic Tellurides and 2-Heteroarylzinc Chlorides.

Gilson Zeni, Diego Alves, Antonio L. Braga, Helio A. Stefani, Cristina W. Nogueira

Journal:

Year:

2004

File:

PDF, 19 KB

2004

30

Synthesis of 1,3-Enynes via Suzuki-Type Reaction of Vinylic Tellurides and Potassium Alkynyltrifluoroborate Salts.

Helio A. Stefani, Rodrigo Cella, Felipe A. Doerr, Claudio M. P. Pereira, Gilson Zeni, Marlito Jr. Gomes

Journal:

Year:

2005

File:

PDF, 23 KB

2005

31

Advances in Organic Tellurium Chemistry

Nicola Petragnani, Helio A. Stefani

Journal:

Year:

2005

File:

PDF, 8 KB

2005

32

Ultrasound-Assisted Synthesis of Functionalized Arylacetylenes.

Helio A. Stefani, Rodrigo Cella, Felipe A. Doerr, Claudio M. P. de Pereira, Fabio P. Gomes, Gilson Zeni

Journal:

Year:

2005

File:

PDF, 26 KB

2005

33

A Mild and Efficient Method for Halogenation of 3,5-Dimethyl Pyrazoles by Ultrasound Irradiation Using N-Halosuccinimides.

Helio A. Stefani, Claudio M. P. Pereira, Roberta B. Almeida, Rodolpho C. Braga, Karla P. Guzen, Rodrigo Cella

Journal:

Year:

2006

File:

PDF, 24 KB

2006

34

ChemInform Abstract: Ultrasound in Heterocycles Chemistry

Rodrigo Cella, Helio A. Stefani

Journal:

Year:

2009

File:

PDF, 15 KB

2009

35

ChemInform Abstract: Synthesis of Benzophenones from Geminal Biaryl Ethenes Using m-Chloroperbenzoic Acid.

Fateh V. Singh, Humberto M. S. Milagre, Marcos N. Eberlin, Helio A. Stefani

Journal:

Year:

2009

File:

PDF, 24 KB

2009

36

ChemInform Abstract: Synthesis of Symmetrical 1,3-Diynes via Homocoupling Reaction of n-Butyl Alkynyltellurides.

Fateh V. Singh, Monica F. Z. J. Amaral, Helio A. Stefani

Journal:

Year:

2009

File:

PDF, 19 KB

2009

37

ChemInform Abstract: Palladium-Catalyzed Oxidative Homocoupling of Potassium Alkenyltrifluoroborates: Synthesis of Symmetrical 1,3-Dienes.

Mineia Weber, Fateh V. Singh, Adriano S. Vieira, Helio A. Stefani, Marcio W. Paixao

Journal:

Year:

2009

File:

PDF, 29 KB

2009

38

ChemInform Abstract: Synthesis of α,β-Unsaturated Aryl Esters via Heck Reaction of Unsymmetrical Aryl Tellurides.

Helio A. Stefani, Jesus M. Pena, Kemilla Gueogjian, Nicola Petragnani, Boniek G. Vaz, Marcos N. Eberlin

Journal:

Year:

2010

File:

PDF, 25 KB

2010

39

ChemInform Abstract: Stereoselective Nucleophilic Addition of Potassium Alkyltrifluoroborates to Cyclic N-Acyliminium Ions: A Simple and Mild Approach to Chiral 5-Alkyl-pyrrolidin-2-ones.

Adriano S. Vieira, Fernando P. Ferreira, Alexandre S. Guarezemini, Helio A. Stefani

Journal:

Year:

2010

File:

PDF, 21 KB

2010

40

ChemInform Abstract: Ultrasound-Assisted Synthesis of Symmetrical Biaryls by Palladium-Catalyzed Detelluration of 1,2-Diarylditellanes.

Fateh V. Singh, Helio A. Stefani

Journal:

Year:

2010

File:

PDF, 34 KB

2010

41

ChemInform Abstract: α-Arylation and Alkynylation of Cyclic α-Iodoenones Using Palladium-Catalyzed Cross-Coupling Reactions with Trifluoroborate Salts.

Kemilla Gueogjian, Fateh V. Singh, Jesus M. Pena, Monica F. Z. J. Amaral, Helio A. Stefani

Journal:

Year:

2010

File:

PDF, 37 KB

2010

42

ChemInform Abstract: One-Pot Synthesis of α,β-Epoxy Ketones by Palladium-Catalyzed Epoxidation—Oxidation of Terminal Allylic Alcohols.

Fateh V. Singh, Jesus M. Pena, Helio A. Stefani

Journal:

Year:

2010

File:

PDF, 24 KB

2010

43

ChemInform Abstract: Enantioselective Arylations Catalyzed by Carbohydrate-Based Chiral Amino Alcohols.

Ana Dioneia Wouters, Gustavo H. G. Trossini, Helio A. Stefani, Diogo S. Luedtke

Journal:

Year:

2010

File:

PDF, 80 KB

2010

44

ChemInform Abstract: Homocoupling Reactions of Alkynes, Alkenes and Alkyl Compounds

Helio A. Stefani, Alexandre S. Guarezemini, Rodrigo Cella

Journal:

Year:

2011

File:

PDF, 20 KB

2011

45

ChemInform Abstract: Functionalization of (2S)-Isopropyl-5-iodo-2,3-dihydro-4(H)-pyrimidin-4-ones by a Suzuki—Miyaura Cross-Coupling Reaction Using Aryltrifluoroborate Salts: Convenient Enantioselective Preparation of α-Substituted β-Amino Acids.

Helio A. Stefani, Monica F. Z. J. Amaral, Gloria Reyes-Rangel, Jorge Vargas-Caporali, Eusebio Juaristi

Journal:

Year:

2011

File:

PDF, 41 KB

2011

46

ChemInform Abstract: Synthesis of (2S)-Isopropyl-5-alkynylpyrimidin-2-ones: Precursors of β-Amino Acids.

Helio A. Stefani, Monica F. Z. J. Amaral, Eusebio Juaristi

Journal:

Year:

2011

File:

PDF, 26 KB

2011

47

ChemInform Abstract: Expanding Cyclitol Structural Diversity by Biocatalysis and Metalocatalysis. A Click Chemistry Approach.

Voctoria de la Sovera, Ana Bellomo, Jesus M. Pena, David Gonzalez, Helio A. Stefani

Journal:

Year:

2011

File:

PDF, 36 KB

2011

48

ChemInform Abstract: Synthesis of 5-Alkynyl-2,2,6-trimethyl-1,3-dioxin-4-ones and 1,4-Disubstituted-1,2,3-triazoles.

Helio A. Stefani, Adriano S. Vieira, Monica F. Z. J. Amaral, Leora Cooper

Journal:

Year:

2011

File:

PDF, 34 KB

2011

49

ChemInform Abstract: Negishi Cross-Coupling of Organotellurium Compounds: Synthesis of Biaryls, Aryl-, and Diaryl Acetylenes.

Helio A. Stefani, Jesus M. Pena, Flavia Manarin, Romulo A. Ando, Daiana M. Leal, Nicola Petragnani

Journal:

Year:

2011

File:

PDF, 31 KB

2011

50

ChemInform Abstract: Modular Synthesis of Mono-, Di-, and Tri-1,4-Disubstituted-1,2,3-triazoles Through Copper-Mediated Alkyne—Azide Cycloaddition.

Helio A. Stefani, Hugo A. Canduzini, Favia Manarin

Journal:

Year:

2012

File:

PDF, 15 KB

2012