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Journal of Organic Chemistry, 2019
CO2/photoredox-cocatalyzed tandem oxidative cyclization of α-bromo ketones and amines for the preparation of substituted oxazoles has been achieved. The avoidance of using both transition-metal catalysts and peroxides makes this method more sustainable ...
Xiaowei Zhang +5 more
semanticscholar +1 more source
CO2/photoredox-cocatalyzed tandem oxidative cyclization of α-bromo ketones and amines for the preparation of substituted oxazoles has been achieved. The avoidance of using both transition-metal catalysts and peroxides makes this method more sustainable ...
Xiaowei Zhang +5 more
semanticscholar +1 more source
2008
This chapter is a literature review of oxazole chemistry covering the period from 1995 to 2006. It includes experimental structural methods for oxazole characterizations, a brief discussion on the thermodynamic aspects of the heterocycle, and a detailed section on the reactivity and the synthesis of the heterocycle.
V. Yeh, R. Iyengar
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This chapter is a literature review of oxazole chemistry covering the period from 1995 to 2006. It includes experimental structural methods for oxazole characterizations, a brief discussion on the thermodynamic aspects of the heterocycle, and a detailed section on the reactivity and the synthesis of the heterocycle.
V. Yeh, R. Iyengar
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Chemistry of Heterocyclic Compounds, 1967
Mercuration of oxazole derivatives is studied. As a result mono- and disubstituted mercury derivatives, hitherto not described in the literature, are obtained. The ability of the oxazole ring to undergo mercuration decreases in the order C-5>C-4 ≥C-2.
G. P. Klimisha, O. P. Shvaika
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Mercuration of oxazole derivatives is studied. As a result mono- and disubstituted mercury derivatives, hitherto not described in the literature, are obtained. The ability of the oxazole ring to undergo mercuration decreases in the order C-5>C-4 ≥C-2.
G. P. Klimisha, O. P. Shvaika
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Journal of Organic Chemistry, 2019
A new efficient DEAD-promoted oxidative Ugi/Wittig reaction for the preparation of 2-(1,2,3,4-tetrahydroisoquinolin-1-yl)oxazoles has been developed. The one-pot reactions of odorless isocyano(triphenylphosphoranylidene)acetates, carboxylic acids and N ...
Mei Sun, Long Zhao, M. Ding
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A new efficient DEAD-promoted oxidative Ugi/Wittig reaction for the preparation of 2-(1,2,3,4-tetrahydroisoquinolin-1-yl)oxazoles has been developed. The one-pot reactions of odorless isocyano(triphenylphosphoranylidene)acetates, carboxylic acids and N ...
Mei Sun, Long Zhao, M. Ding
semanticscholar +1 more source
Synthesis of Steroidal Oxazoles
Synthetic Communications, 1983Abstract Substituted oxazoles were recognized as intermediates for the synthesis of antibiotics1 and used as azadienes in Diel's-Alder reactions.2-5 Certain oxazole derivatives have been reported to possess biological activities such as hypertensive,6 analgesic,7 fungicide,8 antiinflammatory9', 10antiviral,11 antibacterial,11 antitubercular12 and ...
Shafiullah, Javed A. Ansari
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Chemical Communications, 2018
An elemental tellurium mediated synthesis of 2-(trifluoromethyl)oxazoles from the reaction of acetophenone oxime acetates with trifluoroacetic anhydride has been developed.
B. Luo, Z. Weng
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An elemental tellurium mediated synthesis of 2-(trifluoromethyl)oxazoles from the reaction of acetophenone oxime acetates with trifluoroacetic anhydride has been developed.
B. Luo, Z. Weng
semanticscholar +1 more source
Organic Letters, 2018
A radical C-H arylation reaction of oxazoles with (hetero)aryl iodides using Cs2CO3 as base/electron donor and 1,1'-bis(diphenylphosphino) ferrocene (dppf) as a catalytic SET mediator is reported.
Zhengwei Guo +5 more
semanticscholar +1 more source
A radical C-H arylation reaction of oxazoles with (hetero)aryl iodides using Cs2CO3 as base/electron donor and 1,1'-bis(diphenylphosphino) ferrocene (dppf) as a catalytic SET mediator is reported.
Zhengwei Guo +5 more
semanticscholar +1 more source
Monosubstituted Oxazoles. 1. Synthesis of 5-Substituted Oxazoles by Directed Alkylation
The Journal of Organic Chemistry, 1998A general method is presented for synthesis of 2-(methylthio)-5-substituted oxazoles 2. Deprotonation of the readily available 2-(methylthio)oxazole (1) with n-BuLi occurs smoothly in the presence of TMEDA and regiospecifically at C5. The organometallic 1a added rapidly to aldehydes and other electrophiles to provide 5-substituted-2-(methylthio ...
Cynthia M. Shafer, Tadeusz F. Molinski
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Synthesis of perfluorinated oxazoles
Chemistry of Heterocyclic Compounds, 1989AbstractThe defluorination of the perfluoroacylimines (I) in the presence of metallic zinc gives the 2‐perfluoroalkyl‐substituted oxazoles (II) as the result of an intramolecular cyclization.
V. M. Koshelev +3 more
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