Sudipta Ponra : rechercher sur Z-Library

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1

Green Synthesis of Benzopyran-Annulated Thiopyrano[2,3-b]thiochromen-5(4H)-ones by Domino Knoevenagel-Hetero-Diels-Alder Reaction

Majumdar, K., Taher, Abu, Ponra, Sudipta

Journal:

Année:

2010

Langue:

english

Fichier:

PDF, 194 KB

english, 2010

2

Recent Developments in Transition-Metal-Catalyzed Asymmetric Hydrogenation of Enamides

Ponra, Sudipta, Boudet, Bernard, Phansavath, Phannarath, Ratovelomanana-Vidal, Virginie

Journal:

Année:

2020

Fichier:

PDF, 1.03 MB

2020

3

Catalyst-free regioselective synthesis of benzopyran-annulated thiopyrano[2,3-b]thiochromen-5-(4H)-one derivatives by domino-Knoevenagel-hetero-Diels–Alder reaction of terminal alkynes with 4-hydroxy dithiocoumarin in aqueous medium

K.C. Majumdar, Abu Taher, Sudipta Ponra

Journal:

Tetrahedron Letters

Année:

2010

Langue:

english

Fichier:

PDF, 1017 KB

english, 2010

4

Catalyst-free domino-Knoevenagel-hetero-Diels–Alder reaction of terminal alkynes in water: an efficient one-step synthesis of indole-annulated thiopyranobenzopyran derivatives

K.C. Majumdar, Abu Taher, Sudipta Ponra

Journal:

Tetrahedron Letters

Année:

2010

Langue:

english

Fichier:

PDF, 935 KB

english, 2010

5

Diastereo- and Enantioselective Synthesis of Fluorine Motifs with Two Contiguous Stereogenic Centers

Ponra, Sudipta, Rabten, Wangchuk, Yang, Jianping, Wu, Haibo, Kerdphon, Sutthichat, Andersson, Pher G.

Journal:

Journal of the American Chemical Society

Année:

2018

Langue:

english

Fichier:

PDF, 717 KB

english, 2018

6

ChemInform Abstract: Unusual Product from Condensative Cyclization: Pyrano[3,2-f]quinolin-3,10-diones from 6-Amino-5-[(trimethylsilyl)ethynyl]-2H-chromen-2-one and Aryl Aldehydes.

K. C. Majumdar, Abu Taher, Sudipta Ponra

Journal:

Année:

2010

Fichier:

PDF, 33 KB

2010

7

ChemInform Abstract: Catalyst-Free Regioselective Synthesis of Benzopyran-Annulated Thiopyrano[2,3-b]thiochromen-5-(4H)-one Derivatives by Domino-Knoevenagel-hetero-Diels—Alder Reaction of Terminal Alkynes with 4-Hydroxy Dithiocoumarin in Aqueous Medium.

K. C. Majumdar, Abu Taher, Sudipta Ponra

Journal:

Année:

2010

Fichier:

PDF, 22 KB

2010

8

ChemInform Abstract: A New Efficient Method for the Synthesis of 3,4-Dihydro-2H-1,4-benzoxazines via Iodocyclization.

K. C. Majumdar, Krishanu Ray, Sudipta Ponra

Journal:

Année:

2011

Fichier:

PDF, 26 KB

2011

9

ChemInform Abstract: Copper(I)-Catalyst-Free Approach for the Synthesis of Chromene-Fused Pyrido[3,2-d]pyrimidines by Lewis Acid Catalyzed Aza-Diels—Alder Reaction.

K. C. Majumdar, Sudipta Ponra, Sintu Ganai

Journal:

Année:

2011

Fichier:

PDF, 24 KB

2011

10

ChemInform Abstract: Green Synthesis of Benzopyran-Annulated Thiopyrano[2,3-b]thiochromen-5(4H)-ones by Domino Knoevenagel—Hetero-Diels—Alder Reaction.

K. C. Majumdar, Abu Taher, Sudipta Ponra

Journal:

Année:

2011

Fichier:

PDF, 26 KB

2011

11

ChemInform Abstract: Efficient One-Pot Synthesis of Substituted 4,7-Phenanthroline, Pyrano[3,2-f]quinoline and Pyrano[3,2-g]quinoline Derivatives by Aza-Diels—Alder Reaction.

K. C. Majumdar, Sudipta Ponra, Debankan Ghosh, Abu Taher

Journal:

Année:

2011

Fichier:

PDF, 32 KB

2011

12

ChemInform Abstract: Dihydro-3H-chromeno[3,4-b][4,7]phenanthrolin-3-one and Chromeno[4,3-b]pyrano[3,2-f]quinolin-3(13H)-one Derivatives by Aza-Diels—Alder Reaction.

K. C. Majumdar, Sudipta Ponra, Abu Taher

Journal:

Année:

2011

Fichier:

PDF, 24 KB

2011

13

ChemInform Abstract: Efficient, One-Pot Synthesis of Pyrido[3,2-d]pyrimidine Derivatives.

K. C. Majumdar, Sudipta Ponra, Debankan Ghosh

Journal:

Année:

2011

Fichier:

PDF, 24 KB

2011

14

ChemInform Abstract: An Efficient Synthesis of Pyrrolocoumarins and Pyrroloquinolones by Acid-Catalyzed Cyclization of Acetylenic Amines in Water.

K. C. Majumdar, Sudipta Ponra, Somjit Hazra, B. Roy

Journal:

Année:

2011

Fichier:

PDF, 28 KB

2011

15

ChemInform Abstract: Regioselective Synthesis of Chromeno[4′,3′:4,5]pyrano[3,2-c][1,8]naphthyridin-13-one Derivatives by Domino Knoevenagel—Hetero-Diels—Alder Reactions.

K. C. Majumdar, Abu Taher, Sudipta Ponra

Journal:

Année:

2012

Fichier:

PDF, 27 KB

2012

16

BF3·OEt2-Mediated 1,3-Hydride Shift Followed by 6π Electrocyclization: An Efficient Route for the Synthesis of Pyridopyrimidine, Pyranoquinoline, and Phenanthroline Derivatives

Krishna C. Majumdar, Sudipta Ponra, Raj Kumar Nandi

Journal:

European Journal of Organic Chemistry

Année:

2011

Langue:

english

Fichier:

PDF, 557 KB

english, 2011

17

A new efficient method for the synthesis of 3,4-dihydro-2H-1,4-benzoxazines via iodocyclization

K.C. Majumdar, Krishanu Ray, Sudipta Ponra

Journal:

Tetrahedron Letters

Année:

2010

Langue:

english

Fichier:

PDF, 778 KB

english, 2010

18

ChemInform Abstract: Copper(II) Triflate Promoted One-Pot Synthesis of Coumarin-, Quinolone-, and Naphthalene-Annulated 2-Aminothiazoles under Ligand-Free Conditions.

K. C. Majumdar, Nirupam De, Debankan Ghosh, Sudipta Ponra, B. Roy

Journal:

Année:

2012

Fichier:

PDF, 35 KB

2012

19

ChemInform Abstract: Indium(III) Chloride Catalyzed Convergent, Regioselective Synthesis of Annulated Quinoline and Pyridine Derivatives.

K. C. Majumdar, Raj Kumar Nandi, Sudipta Ponra

Journal:

Année:

2012

Fichier:

PDF, 28 KB

2012

20

ChemInform Abstract: BF3·OEt2-Mediated 1,3-Hydride Shift Followed by 6π Electrocyclization: An Efficient Route for the Synthesis of Pyridopyrimidine, Pyranoquinoline, and Phenanthroline Derivatives.

Krishna C. Majumdar, Sudipta Ponra, Raj Kumar Nandi

Journal:

Année:

2012

Fichier:

PDF, 39 KB

2012

21

ChemInform Abstract: One-Pot Efficient Green Synthesis of Spirooxindole-Annulated Thiopyran Derivatives via Knoevenagel Condensation Followed by Michael Addition.

K. C. Majumdar, Sudipta Ponra, Raj Kumar Nandi

Journal:

Année:

2012

Fichier:

PDF, 24 KB

2012

22

One-pot efficient green synthesis of spirooxindole-annulated thiopyran derivatives via Knoevenagel condensation followed by Michael addition

K.C. Majumdar, Sudipta Ponra, Raj Kumar Nandi

Journal:

Tetrahedron Letters

Année:

2012

Langue:

english

Fichier:

PDF, 1.88 MB

english, 2012

23

ChemInform Abstract: Montmorillonite K-10 Catalyzed, Microwave-Assisted Cyclization of Acetylenic Amines: An Efficient Synthesis of Pyrrolocoumarins and Pyrroloquinolones.

K. C. Majumdar, Sudipta Ponra, Tapas Ghosh

Journal:

Année:

2012

Fichier:

PDF, 25 KB

2012

24

A reductive Mizoroki–Heck approach to dibenzo[b,e]oxepine

Majumdar, K.C., Ghosh, Tapas, Ponra, Sudipta

Journal:

Tetrahedron Letters

Année:

2013

Langue:

english

Fichier:

PDF, 285 KB

english, 2013

25

Regioselective synthesis of pyrano[3,2-f]quinoline and phenanthroline derivatives using molecular iodine

Majumdar, K.C., Ponra, Sudipta, Ghosh, Tapas

Journal:

Tetrahedron Letters

Année:

2013

Langue:

english

Fichier:

PDF, 768 KB

english, 2013

26

Synthesis of novel pyrano[3,2-f]quinoline, phenanthroline derivatives and studies of their interactions with proteins: An application in mammalian cell imaging

Majumdar, K.C., Ponra, Sudipta, Ghosh, Tapas, Sadhukhan, Ratan, Ghosh, Utpal

Journal:

European Journal of Medicinal Chemistry

Année:

2014

Langue:

english

Fichier:

PDF, 1.26 MB

english, 2014

27

ChemInform Abstract: Regioselective Synthesis of Dihydropyridocoumarin and Phenanthrolinone Derivatives via Iron(III) Chloride Mediated Intramolecular Cyclization.

Majumdar, K. C., Ponra, Sudipta

Journal:

Année:

2014

Fichier:

PDF, 17 KB

2014

28

HNTf 2 -Catalyzed Regioselective Preparation of Polysubstituted Naphthalene Derivatives Through Alkyne–Aldehyde Coupling

Ponra, Sudipta, Vitale, Maxime R., Michelet, Véronique, Ratovelomanana-Vidal, Virginie

Journal:

Journal of Organic Chemistry

Année:

2015

Langue:

english

Fichier:

PDF, 398 KB

english, 2015

29

Al(OTf)3-Catalyzed Preparation of 4-Hydroxy-3-propargylic Coumarins and Subsequent Regioselective Cyclization towards Furo- or Pyrano[3,2-c]coumarins

Ponra, Sudipta, Gohain, Mukut, van Tonder, Johannes, Bezuidenhoudt, Barend

Journal:

Année:

2015

Langue:

english

Fichier:

PDF, 185 KB

english, 2015

30

Efficient One-Pot Synthesis of Substituted 4,7-Phenanthroline, Pyrano-[3,2-f]quinoline and Pyrano[3,2-g]quinoline Derivatives by Aza-Diels-Alder Reaction

Majumdar, K., Ponra, Sudipta, Ghosh, Debankan, Taher, Abu

Journal:

Année:

2011

Langue:

english

Fichier:

PDF, 144 KB

english, 2011

31

Copper(I)-Catalyst-Free Approach for the Synthesis of Chromene-Fused Pyrido[3,2-d]pyrimidines by Lewis Acid Catalyzed Aza-Diels-Alder Reaction

Majumdar, K., Ponra, Sudipta, Ganai, Sintu

Journal:

Année:

2010

Langue:

english

Fichier:

PDF, 93 KB

english, 2010

32

Indium(III) Chloride Catalyzed Convergent, Regioselective Synthesis of Annulated Quinoline and Pyridine Derivatives

Majumdar, K., Nandi, Raj, Ponra, Sudipta

Journal:

Année:

2012

Langue:

english

Fichier:

PDF, 244 KB

english, 2012

33

Unusual Product from Condensative Cyclization: Pyrano[3,2-f]quinolin-3,10-diones from 6-Amino-5-[(trimethylsilyl)ethynyl]-2H-chromen-2-one and Aryl Aldehydes

Majumdar, K., Taher, Abu, Ponra, Sudipta

Journal:

Année:

2010

Langue:

english

Fichier:

PDF, 128 KB

english, 2010

34

Montmorillonite K-10 Catalyzed, Microwave-Assisted Cyclization of Acetylenic Amines: An Efficient Synthesis of Pyrrolocoumarins and Pyrroloquinolones

Majumdar, K., Ponra, Sudipta, Ghosh, Tapas

Journal:

Année:

2012

Langue:

english

Fichier:

PDF, 180 KB

english, 2012

35

Dihydro-3H-chromeno-[3,4-b][4,7]phenanthrolin-3-one and Chromeno[4,3-b]pyrano[3,2-f]quinolin-3(13H)-one Derivatives by Aza-Diels-Alder Reaction

Majumdar, K., Ponra, Sudipta, Taher, Abu

Journal:

Année:

2011

Langue:

english

Fichier:

PDF, 121 KB

english, 2011

36

An Efficient Synthesis of Pyrrolocoumarins and Pyrroloquinolones by Acid-Catalysed Cyclisation of Acetylenic Amines in Water

Majumdar, K., Ponra, Sudipta, Hazra, Somjit, Roy, B.

Journal:

Année:

2011

Langue:

english

Fichier:

PDF, 95 KB

english, 2011

37

Indium(III) Chloride Catalyzed One-Pot Multicomponent Synthesis of Chromenone- and Quinolone-Annulated Imidazole Derivatives

Majumdar, K., Ghosh, Debankan, Ponra, Sudipta

Journal:

Année:

2013

Langue:

english

Fichier:

PDF, 203 KB

english, 2013

38

Copper(II) Triflate Promoted One-Pot Synthesis of Coumarin-, Quinolone-, and Naphthalene-Annulated 2-Aminothiazoles under Ligand-Free Conditions

Majumdar, K., De, Nirupam, Ghosh, Debankan, Ponra, Sudipta, Roy, B.

Journal:

Année:

2012

Langue:

english

Fichier:

PDF, 118 KB

english, 2012

39

Regioselective Synthesis of Dihydropyridocoumarin and Phenanthrolinone Derivatives via Iron(III) Chloride Mediated Intramolecular Cyclization

Majumdar, K., Ponra, Sudipta

Journal:

Année:

2014

Langue:

english

Fichier:

PDF, 224 KB

english, 2014

40

Asymmetric preparation of polysubstituted cyclopentanes by synergistic Pd(0)/amine catalyzed formal [3+2] cycloadditions of vinyl cyclopropanes with enals

Laugeois, Maxime, Ponra, Sudipta, Vidal, Virginie, Michelet, Véronique, VITALE, Maxime R.

Journal:

Chemical Communications

Année:

2016

Langue:

english

Fichier:

PDF, 1.04 MB

english, 2016

41

Brønsted Acid-Promoted Synthesis of Common Heterocycles and Related Bio-active and Functional Molecules

Ponra, Sudipta, Majumdar, Krishna

Journal:

Année:

2016

Langue:

english

Fichier:

PDF, 3.06 MB

english, 2016

42

ChemInform Abstract: A Reductive Mizoroki-Heck Approach to Dibenzo[b,e]oxepine.

Majumdar, K. C., Ghosh, Tapas, Ponra, Sudipta

Journal:

Année:

2013

Fichier:

PDF, 38 KB

2013

43

ChemInform Abstract: HNTf 2 -Catalyzed Regioselective Preparation of Polysubstituted Naphthalene Derivatives Through Alkyne-Aldehyde Coupling.

Ponra, Sudipta, Vitale, Maxime R., Michelet, Veronique, Ratovelomanana-Vidal, Virginie

Journal:

Année:

2015

Fichier:

PDF, 24 KB

2015

44

ChemInform Abstract: Al(OTf) 3 -Catalyzed Preparation of 4-Hydroxy-3-propargylic Coumarins and Subsequent Regioselective Cyclization Towards Furo- or Pyrano[3,2-c]coumarins.

Ponra, Sudipta, Gohain, Mukut, van Tonder, Johannes H., Bezuidenhoudt, Barend C. B.

Journal:

Année:

2015

Fichier:

PDF, 24 KB

2015

45

ChemInform Abstract: Regioselective Synthesis of Pyrano[3,2-f]quinoline and Phenanthroline Derivatives Using Molecular Iodine.

Majumdar, K. C., Ponra, Sudipta, Ghosh, Tapas

Journal:

Année:

2014

Fichier:

PDF, 30 KB

2014

46

ChemInform Abstract: Synthesis of Novel Pyrano[3,2-f]quinoline, Phenanthroline Derivatives and Studies of Their Interactions with Proteins: An Application in Mammalian Cell Imaging.

Majumdar, K. C., Ponra, Sudipta, Ghosh, Tapas, Sadhukhan, Ratan, Ghosh, Utpal

Journal:

Année:

2014

Fichier:

PDF, 17 KB

2014

47

ChemInform Abstract: Iron(III) Chloride Catalyzed Synthesis of Functionalized Spiropyrimidines.

Majumdar, K. C., Ponra, Sudipta, Ghosh, Tapas

Journal:

Année:

2014

Fichier:

PDF, 27 KB

2014

48

ChemInform Abstract: Broensted Acid-Promoted Synthesis of Common Heterocycles and Related Bio-Active and Functional Molecules

Ponra, Sudipta, Majumdar, K. C.

Journal:

Année:

2016

Fichier:

PDF, 16 KB

2016

49

ChemInform Abstract: Indium(III) Chloride Catalyzed One-Pot Multicomponent Synthesis of Chromenone- Quinolone-Annulated Imidazole Derivatives.

Majumdar, K. C., Ghosh, Debankan, Ponra, Sudipta

Journal:

Année:

2014

Fichier:

PDF, 25 KB

2014

50

ChemInform Abstract: Recent Development of Broensted Acid-Promoted Synthesis of Quinoline, Isoquinoline and Carboline Derivatives

Majumdar, K. C., Ponra, Sudipta

Journal:

Année:

2014

Fichier:

PDF, 17 KB

2014