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Ionic liquid promoted Diels-Alder Reaction between anthrone and maleimides

100%

Mirgane N., Kotwal S., Karnik A.

Open Chemistry

2010

vol. 8

issue 2

356-360

Ionic liquids (IL) are gaining importance as green solvents. Imidazolium ionic liquid [bmim]+[Cl]−, an environmentally benign solvent, was found to promote the Diels-Alder reaction between anthrone and maleimides at room temperature with excellent yields. The ionic liquid played a dual role as solvent and catalyst. [...]

Preparation of a series of N-alkyl-3-boronopyridinium halides and study of their stability in the presence of hydrogen peroxide

88%

Karpichev Y., Matondo H., Kapitanov I., Savsunenko O., Vedrenne M., Poinsot V., Rico-Lattes I., Lattes A.

Open Chemistry

2012

vol. 10

issue 4

1059-1065

A simple and efficient protocol for the preparation of a series of N-alkyl-3-boronopyridinium salts is described which requires exposure of 3-pyridineboronic acid neopentylglycol ester and corresponding alkyle halide to microwave irradiation followed by boronic ester hydrolysis. The technique employed drastically reduces the reaction time and prevents thermal degradation and the formation of side products. Water solutions of the obtained boronopyridinium salts are shown to be stable at room temperature in wide pH range as well as in the presence of hydrogen peroxide at pH 10.0 for 72 h. [...]

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2 Open Chemistry

1 2012

1 2010

1 Kapitanov I.

1 Karnik A.

1 Karpichev Y.

1 Kotwal S.

1 Lattes A.

1 Matondo H.

1 Mirgane N.

1 Poinsot V.

1 Rico-Lattes I.

1 Savsunenko O.

1 Vedrenne M.

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Ionic liquid promoted Diels-Alder Reaction between anthrone and maleimides

Preparation of a series of N-alkyl-3-boronopyridinium halides and study of their stability in the presence of hydrogen peroxide