Zobrazeno 1 - 10 of 38 pro vyhledávání: '"Nagender Punna"'
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Akademický článek
Gas/Liquid‐Phase Micro‐Flow Trifluoromethylation using Fluoroform: Trifluoromethylation of Aldehydes, Ketones, Chalcones, and N‐Sulfinylimines
Autor: Kazuki Hirano, Satoshi Gondo, Nagender Punna, Etsuko Tokunaga, Prof. Dr. Norio Shibata
Publikováno v: ChemistryOpen, Vol 8, Iss 4, Pp 406-410 (2019)
Abstract A micro‐flow nucleophilic trifluoromethylation of carbonyl compounds using gaseous fluoroform was developed. This method also allows the first micro‐flow transformation of N‐sulfinylimines into trifluoromethyl amines with excellent dia
Externí odkaz: https://doaj.org/article/901eaff0a57747c08f6458ce71ba573d
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7
Facile access to [1,2]-oxazine derivatives via annulations of aminoxy-tethered 1,7-enynes
Autor: Raji Reddy Chada, Siddique Z. Mohammed, Kamalkishor Warudikar, Nagender Punna, Roshan Chandrakant Kajare, Mayur C. Bhandari, Mahender Khatravath
Publikováno v: Organic & Biomolecular Chemistry. 19:809-821
An efficient approach for the highly diastereoselective construction of functionalized cyclopenta[d][1,2]oxazines via sequential oxyamination and Pauson-Khand reaction of readily accessible propargylic alcohols has been developed. Furthermore, the ri
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e29ac5d6ed3996d69d28281dfeec897
https://doi.org/10.1039/d0ob02279a
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8
Palladium-catalyzed ortho-vinylation of β-naphthols with α-trifluoromethyl allyl carbonates: one-pot access to naphtho[2,1-b]furans
Autor: Muppidi Subbarao, Nagender Punna, Chiliveru Priyanka
Publikováno v: Organic & Biomolecular Chemistry. 19:8241-8245
Highly regio- and stereoselective palladium-catalyzed ortho-vinylation of β-naphthols (2) has been reported using easily accessible CF3-allyl carbonates (1). The regioselective nucleophilic γ-attack of the CF3–π-allyl–Pd-intermediate is the ke
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b443f2d97de71cc48483d8c2501480e6
https://doi.org/10.1039/d1ob01429c
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9
Synthesis of Both Enantiomers of Nine‐Membered CF 3 ‐Substituted Heterocycles Using a Single Chiral Ligand: Palladium‐Catalyzed Decarboxylative Ring Expansion with Kinetic Resolution
Autor: Motoo Shiro, Hiroto Uno, Etsuko Tokunaga, Norio Shibata, Nagender Punna
Publikováno v: Angewandte Chemie International Edition. 59:8187-8194
The two enantiomers of trifluoromethyl-benzo[c][1,5]oxazonines, (R)-4 and (S)-4, can be selectively accessed with high enantiopurity by the Pd-catalyzed ring-expansion reaction of trifluoromethyl-benzo[d][1,3]oxazinones (1) with vinyl ethylene carbon
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e8c0516f0294e3a268e6189a9496f5c5
https://doi.org/10.1002/anie.201915021
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10
Diastereoselective synthesis of CF3-dihydrobenzofurans by [4+1] annulation of in situ-generated CF3-o-quinone methides and sulfur ylides
Autor: Srivari Chandrasekhar, Jaggaraju Prudhviraj, Nagender Punna, Prathama S. Mainkar, Babli K. Jha
Publikováno v: RSC Advances. 10:38588-38591
An efficient and highly diastereoselective synthesis of CF3-dihydrobenzofurans by the reaction of in situ-generated CF3-oQMs in the presence of a base with sulphur ylides is put forward. The generality of the present developed method was well studied
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f02042ebb1451e5fa0da842c410286cd
https://doi.org/10.1039/d0ra08289a
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