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1 article(s) from Hossain, Md Imran

Synthesis of 3,4,5-trisubstituted isoxazoles in water via a [3 + 2]-cycloaddition of nitrile oxides and 1,3-diketones, β-ketoesters, or β-ketoamides

Md Imran Hossain,
Md Imdadul H. Khan,
Seong Jong Kim and
Hoang V. Le

Beilstein J. Org. Chem. 2022, 18, 446–458, doi:10.3762/bjoc.18.47

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Graphical Abstract

Figure 1: Routes to isoxazoles.

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Figure 2: Possible products of the reaction between nitrile oxides and 1,3-diketones. Path D (C-trapping) pro...

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Figure 3: Reactions between various arylhydroximoyl chlorides and 1,3-diketones. The reactions were performed...

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Figure 4: Reactions between various phenyl hydroximoyl chlorides and β-ketoesters or β-ketoamides. The reacti...

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Figure 5: Reactions between 4-fluorophenyl hydroximoyl chloride (1a) and diethyl malonate (2j) or dibenzyl ma...

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Figure 6: Reactions between phenyl hydroximoyl chlorides 1a,c and 4,4,4-trifluoro-1-phenyl- (2l) and 4,4,4-tr...

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Figure 7: ¹H NMR spectra of 1-phenyl-1,3-butanedione (2a) in methanol-d₄ (top) and in CDCl₃ (bottom).

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Figure 8: A plausible mechanism for the formation of the 3,4,5-trisubstituted isoxazoles 3 in the presence of...

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Figure 9: Structures of β-lactamase-resistant antibiotics oxacillin, cloxacillin, dicloxacillin, and flucloxa...

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Published 22 Apr 2022

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