Výsledky vyhledávání - "Venkata Nagarjuna Babu"

Regioselective C3–H Trifluoromethylation of 2H-Indazole under Transition-Metal-Free Photoredox Catalysis

Autor: Nagaraj Sabarinathan, Duddu S. Sharada, Ashok Polu, Venkata Nagarjuna Babu, Manickam Bakthadoss, Arumugavel Murugan

Publikováno v: The Journal of Organic Chemistry. 84:7796-7803

Trifluoromethyl-substituted heteroarenes are biologically active compounds and useful building blocks. In this sequence, we have developed a visible-light-promoted regioselective C3-H trifluoromethylation of 2 H-indazole under metal-free conditions,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2cfc388147cf9cef8f65f634aea94bf3
https://doi.org/10.1021/acs.joc.9b00676

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PIDA/TBAB-Promoted Oxidative Geminal Dibromofunctionalization of Alkynes: Direct Synthesis of Geminal Diazides

Autor: Duddu S. Sharada, Sagar Arepally, Venkata Nagarjuna Babu, Ashok Polu

Publikováno v: European Journal of Organic Chemistry. 2018:5700-5705

PIDA/TBAB-promoted oxidative geminal diazidofunctionalization of alkynes has been described for the first time. The transformation demonstrates a mechanistically distinctive approach to access geminal diazides, in which TBAB plays a crucial role as b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c93dde79c7b2cb7eee2732b255902fe0
https://doi.org/10.1002/ejoc.201801081

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Regioselective C3-H Trifluoromethylation of 2H-Indazole Under Transition-Metal-Free Photoredox Catalysis

Autor: Sharada Duddu. S, Arumugavel Murugan, Nagaraj Sabarinathan, Venkata Nagarjuna Babu

Here we report a visible-light-promoted metal-free regioselective C3-H trifluoromehtylation reaction that proceeds via radical mechanism and which supported by control experiments. The combination of photoredox catalysis and hypervalent iodine reagen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4cf3987523c9d0ee1f096b02a3c7eca9
https://doi.org/10.26434/chemrxiv.7796603

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I2-promoted denitration strategy: one-pot three component synthesis of pyrrole-fused benzoxazines

Autor: A. Sagar, Arnab Dey, Duddu S. Sharada, Venkata Nagarjuna Babu

Publikováno v: Tetrahedron Letters. 56:2710-2713

A facile and efficient protocol for the synthesis of pyrrole-fused benzoxazines has been developed via a novel molecular iodine-promoted denitration strategy, involving 2-amino phenols, acetylenic esters and β-nitrostyrene derivatives. This method o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0c32db65abbbb8b76fac1d28a9e2ce63
https://doi.org/10.1016/j.tetlet.2015.04.011

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Silica gel promoted environment-friendly synthesis of α-amino amidines and regioselective transformation of α-amino amidines into amidino substituted indazoles

Autor: A. Sagar, Duddu S. Sharada, Venkata Nagarjuna Babu

Publikováno v: RSC Advances. 5:29066-29071

Environment-friendly three-component Ugi-type strategy (U-3CR) for the synthesis of a wide variety of α-amino amidines has been developed by using silica gel as promoter, and a novel access to amidino substituted indazoles in a regioselective manner

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::012c15316da23a5c2a7a3eb43278e1cf
https://doi.org/10.1039/c5ra02491a

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A Direct Cycloaminative Approach to Imidazole Derivatives via Dual C-H Functionalization

Autor: Manickam Bakthadoss, Duddu S. Sharada, Sagar Arepally, Venkata Nagarjuna Babu

Publikováno v: Organic letters. 19(19)

Organoiodine(III)-promoted C(sp3)–H azidation was a key step for the cycloaminative process. An unprecedented method for metal-free dehydrogenative N-incorporation into C(sp3)–H and C(sp2)–H bonds for the synthesis of diverse imidazoles has bee

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b933008075dedd6eae2508764638fe9
https://pubmed.ncbi.nlm.nih.gov/28901153

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A metal-free cyclic iminium induced one-pot double annulation cascade: access to dihydroisoquinolinium (DHIQ) salts

Autor: Venkata Nagarjuna Babu, A. Sagar, Duddu S. Sharada, Anand H. Shinde

Publikováno v: Organicbiomolecular chemistry. 14(44)

A reactive cyclic iminium induced one-pot Groebke–Blackburn–Bienayme (GBB) double annulation cascade (DAC) for the synthesis of skeletally diverse DHIQ salts has been described. The key features of this protocol are transition-metal and solvent-f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be593d54a3096a4cbc804c0b9b1129b2
https://pubmed.ncbi.nlm.nih.gov/27782280

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ChemInform Abstract: I2-Promoted Denitration Strategy: One-Pot Three Component Synthesis of Pyrrole-Fused Benzoxazines

Autor: Arnab Dey, Duddu S. Sharada, Venkata Nagarjuna Babu, A. Sagar

Publikováno v: ChemInform. 46

Coupling of 2-aminophenols with acetylenic ester (II) affords alkylidene benzoxazine intermediates.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::13000d40c272baf23c5d48e7089f0175
https://doi.org/10.1002/chin.201536203

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ChemInform Abstract: Silica Gel Promoted Environment-Friendly Synthesis of α-Amino Amidines and Regioselective Transformation of α-Amino Amidines into Amidino Substituted Indazoles

Autor: A. Sagar, Venkata Nagarjuna Babu, Duddu S. Sharada

Publikováno v: ChemInform. 46

The scalable preparation of α-amino amidines is based on a three-component Ugi-type reaction promoted by silica gel which is recycled and reused in two successive runs with marginal loss of its activity.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b4e2e3831052e1791995d5310d505f24
https://doi.org/10.1002/chin.201534168

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