Výsledky vyhledávání - "K. C. Kumara Swamy"

Akademický článek

Allenylphosphine oxides as simple scaffolds for phosphinoylindoles and phosphinoylisocoumarins

Autor: G. Gangadhararao, Ramesh Kotikalapudi, M. Nagarjuna Reddy, K. C. Kumara Swamy

Publikováno v: Beilstein Journal of Organic Chemistry, Vol 10, Iss 1, Pp 996-1005 (2014)

A range of phosphinoylindoles was prepared in one-pot from functionalized propargyl alcohols and a suitable P(III) precursor via a base-mediated reaction. The reaction proceeds via the intermediacy of allenylphosphine oxides. Similarly, phosphinoylis

Externí odkaz: https://doaj.org/article/46a861c7dd1f4669bd87f57e85fe6a92

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Ru(ii)-catalysed oxidative (4 + 2) annulation of chromene and coumarin carboxylic acids with alkynes/propargylic alcohols: isolation of Ru(0) complexes

Autor: Mallepalli Shankar, K. C. Kumara Swamy

Publikováno v: Organic & Biomolecular Chemistry. 21:195-208

Ru(ii)-catalysed oxidative (4 + 2) annulation of chromene and coumarin carboxylic acids with alkynes affords pyrano-chromones via vinylic C–H bond activation; use of methyl-tethered propargylic alcohols instead of alkynes gives Ru(0) complexes.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::70a7f6b5792144f74e514d6883f4e484
https://doi.org/10.1039/d2ob01890j

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Ring expansion/opening reactions of epoxy ene-amides: access to azabicyclononene, tetrahydropyridine and tetrazole scaffolds

Autor: null Suraj, K. C. Kumara Swamy

Publikováno v: New Journal of Chemistry. 47:9061-9065

Epoxy benzene sulfonamides and substituted chloro-acrylaldehydes under Lewis acid mediation afford azabicyclononene or tetrahydropyridine frameworks; in the presence of additional Me3SiN3, 1,2-substituted tetrazoles are the products.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::003c8158fb0f2553ed58447766044aac
https://doi.org/10.1039/d3nj00529a

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Divergent Reactivity of Phosphorylated and Related Allenes: [4 + 2] Cycloaddition with 3,6-Diphenyltetrazine, Self-Addition Leading to Dimers and [Pd]-Complex Formation

Autor: Mallepalli Shankar, Adula Kalyani, Mandala Anitha, Alla Siva Reddy, K. C. Kumara Swamy

Publikováno v: The Journal of Organic Chemistry. 87:13683-13697

Phosphorus-based naphthalenes are formed by self-dimerization-cum-cyclization of α-aryl allenylphosphonates or allenylphosphine oxides using catalytic Pd(OAc)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab6f73417e3361dd63b7e9788c3ad63d
https://doi.org/10.1021/acs.joc.2c01337

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(3+2) Cycloadditions of Vinyl Sulfonyl Fluorides with Ethyl Diazoacetate or Azides: Metal-Free Synthesis of Pyrazole and Triazole Scaffolds via SO2 Elimination

Autor: K. C. Kumara Swamy, K. Sandeep, A. Sanjeeva Kumar, Asif Ali Qureshi

Publikováno v: Synthesis. 54:4111-4119

A (3+2) cycloaddition reaction between substituted vinyl sulfonyl fluorides and ethyl diazoacetate or azides for the rapid construction of pyrazole or triazole cores via Michael addition and SO2 gas elimination is developed. Trimethylsilyl azide or o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3730c8e6bfc63793538cb5edc77b195f
https://doi.org/10.1055/s-0041-1737485

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Pd-catalysed intramolecular transformations of indolylbenzenesulfonamides: ortho-sulfonamido-bi(hetero)aryls via C2-arylation and polycyclic sultams via C3 arylation

Autor: Rajnikanth Sunke, Shabbir Ahmed Khan, K. C. Kumara Swamy

Publikováno v: Organic & Biomolecular Chemistry. 20:9148-9160

Indolyl substituted iodo-sulfonamides deliver 2-aryl(sulfonamido)indoles in the presence of Pd(OAc)2/Ph3P/Et3N; the same reactants, using Pd(OAc)2/Ph3P/K2CO3, afford indole-fused sultams.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f3e98b43618506a3db9e35378f89fccd
https://doi.org/10.1039/d2ob01610a

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Stereo- and Regioselective [3+2] Cycloaddition of Acetoxy Allenoates with Azides: Metal-Free Synthesis of Multisubstituted Triazoles

Autor: Arpula Sanjeeva Kumar, K. C. Kumara Swamy, Sachin Chauhan, Asif Ali Qureshi

Publikováno v: Synthesis. 54:965-974

We have developed a regio- and stereoselective thermal [3+2]-cycloaddition protocol involving acetoxy allenoates as 1,2-dipoles under metal-free conditions for the synthesis of 1,4,5-tri/1,5-disubstituted 1,2,3-triazoles. δ-Acetoxy allenoates act as

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1a19252e787dd81697e5e8b80797cfb8
https://doi.org/10.1055/s-0040-1719838

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