Denis Luart

Quinoline and phenanthroline preparation starting from glycerol via improved microwave-assisted modified Skraup reaction

An efficient “green” modified Skraup reaction in neat water was developed using inexpensive, abundant and environmentally-friendly glycerol under microwave irradiation conditions. Starting from aniline derivatives, various quinolines were obtained in 10–66% yields. The use of nitroaniline led to the corresponding phenanthrolines in 15–52% yields, respectively.

First examples of Doebner-Miller reaction in flow: Efficient production of 2-methylquinoline derivatives in water

AbstractProduction of quinaldine and derivatives is proposed using sulfuric acid as commercial homogeneous acid catalyst in water in continuous flow chemistry. This approach is a rapid, practical and green route for the synthesis of 2-methylquinolines and permit to obtain the target compounds in 39–91% yields.

Metal-Free Reduction of Nitrobenzene to Aniline in Subcritical Water

An environmentally friendly approach for the reduction of nitrobenzene to aniline promoted by carbonaceous bio-based materials was successfully achieved under subcritical water conditions. The proposed methodology features a metal-free process, no-hydrogen input as reductor, the use of commercial bio-based carbon materials having low cost and availability, and water as green solvent under subcritical conditions. Using optimized conditions, reduction of nitrobenzene in the presence of commercial NORIT GAC 12-40 or DACARB PC1000 was accomplished at 310 °C for 6 h and quantitatively furnished the target aniline. Treatment of NORIT GAC 12-40 with KOH allowed to decrease charcoal loading (6 g vs 40 g) and increase aniline yields (80% vs 66%).