Results 81 to 90 of about 5,322 (210)
Triflic anhydride-mediated synthesis of oxazoles
, 2016 N-Acyl amino acid esters undergo triflic anhydride-mediated cyclodehydration to form oxazoles and bisoxazoles in a simple one-pot transformation. © 2008 Elsevier Ltd.
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Proceedings, 2019 An efficient Microwave (MW)-assisted synthesis of eight new 6-nitrilmethyl-pyrrolo[3,4-b]pyridin-5-ones via a domino process: aza Diels–Alder/N-acylation/aromatization (dehydration–decarboxylation) from their corresponding 2-aminonitrile ...
Manuel A. Rentería-Gómez +4 more
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Active γ-manganese dioxide promoted conversion of 4,5-dihydro-1,2-oxazoles to 1,2-oxazoles.
, 1977 Dehydrogenation of seven dihydrooxazoles I (R1 = Ph, octyl, Me, Ph, 2-naphthyl, CO2Me, hexyl; R2 = H, NO2; R3 = Me, Ph, (CH2)2CO2Me) with γ-MnO2 gave 97-100% oxazoles ...
BENETTI, Simonetta +3 more
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Synthesis of 2‑(Hetero)aryl-5-(trimethylsilylethynyl)oxazoles from (Hetero)arylacrylic Acids
, 2015 A three-step method for the synthesis of 2-(hetero)aryl-5-(trimethylsilylethynyl)oxazoles is described. Easily accessible bis(trimethylsilyl)acetylene and acrylic acid derivatives are used as starting materials for the preparation of mono- and ...
Alena S. Pankova (1617217) +2 more
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Solid-Phase Rhodium Carbenoid Reactions: An N−H Insertion Route to a Diverse Series of Oxazoles
, 2016 The solid-phase synthesis of a series of oxazoles is described. The key step in the construction of these molecules involves the rhodium-catalyzed decomposition of polymer-bound α-diazo-β-ketoesters.
Carsten Spanka (2153536) +2 more
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From Propargylic Amides to Functionalized Oxazoles: Domino Gold Catalysis/Oxidation by Dioxygen
, 2016 A new, highly efficient, and atom-economic access to a series of functionalized 2,5-disubstituted oxazoles from propargylic amides is reported. A series of propargylic amides were transformed to the corresponding alkylideneoxazolines by a gold(I ...
A. Stephen K. Hashmi (1264071) +3 more
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Journal of Chemistry, 2015 Aromaticities of five membered heterocycles, containing up to three heteroatoms, are quantified through the dimethyldihydropyrene (DHP) probe. Bond fixation caused by the fusion of heterocycles to the dimethyldihydropyrene nucleus (DHPN) was measured by ...
Maria, Khurshid Ayub
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, 2002 The addition of 2-(lithioalkyl)-4,5-dihydro-1,3-oxazoles 2a-c and 2-[chloro(lithio)alkyl]-4,5-dihydro-1,3-oxazoles 2d,e to nitrones 3 has been studied.
SAVERIO FLORIO +3 more
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, 2018 A new strategy has been developed for the construction of oxazoles from methyl ketones and TosMIC via self-sorting oxidative domino reaction strategy. In contrast to its usual reactivity as C–N≡C synthon in the synthesis of oxazoles, TosMIC was utilized ...
Palakodety Radha Krishna (2130520) +2 more
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Stereoselective Direct Copper-Catalyzed Alkenylation of Oxazoles with Bromoalkenes
, 2016 A copper-catalyzed direct alkenylation of oxazoles with bromoalkenes has been developed. The method is both regio- and stereoselective and tolerates a variety of functional groups.
Sandrine Piguel (2145475) +3 more
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