Centre National De La Recherche Scientifique

Université De Poitiers

Le Centre National De La Recherche Scientifique

Francois Jerome

Henry Ledon

Roger Guilard

Joel Barrault

Didier Morvan

Bruno Roux-Fouillet

Eric Muller

Gabriel Canard

Yannick Pouilloux

Jean-Michel Barbe

Alban Chappaz

Karine De Oliveira Vigier

Rodolphe De Sousa

Jonathan Lai

Matthieu Corbet

Geraud Dubois

Stephane Brandes

A process for synthesizing at least one levulinate ester, said process comprising the reaction of furfuryl alcohol with at least one other alcohol in the presence of water and at least one catalyst, said furfuryl alcohol being present in a quantity of at least 5% by weight, based on the total weight of the alcohols, and said catalyst comprising at least one triflate ligand and at least one metal selected from bismuth, gallium, aluminum, tin and iron.

Process for the preparation of levulinate esters

The present invention concerns a method for the synthesis of glycerol dithiocarbamates or bis-dithiocarbamates (GDTCs) in which a reaction medium comprising (1) a carbonate selected from diethyl carbonate, dimethyl carbonate and ethylene or propylene carbonate associated with a glycerol type polyol in the presence of a basic catalyst or (2) a cyclic carbonate comprising five ring members, in a solvent medium, is supplemented with a primary or secondary amine in the presence of carbon disulphide, and the GDTC formed is recovered. In particular, a glycerol type polyol is brought into the presence of diethyl carbonate in the presence of a catalyst, then a primary or secondary amine is added to the reaction medium in the presence of carbon disulphide, and the GDTC formed is recovered. The invention can be used for one-step synthesis of glycerol dithiocarbamates directly from glycerol as the starting material and solvent. This method involves glycerol, diethyl carbonate, carbon disulphide (CS) and a primary or secondary amine to produce glycerol dithiocarbamates; the glycerol/NaOH phase can be recycled 6 times without a noticeable drop in yield; the ethyl acetate is also recycled after each extraction.

Method for preparing dithiocarbamates in particular from polyols of the glycerol type

Growing community of inventors

Sèvres-Anxaumont, France

Francois Jerome