- METHOD FOR PREPARING DITHIOCARBAMATES IN PARTICULAR FROM POLYOLS OF THE GLYCEROL TYPE
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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 (CS2) 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.
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Page/Page column 6-9
(2012/10/23)
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- Regioselective functionalization of glycerol with a dithiocarbamate moiety: An environmentally friendly route to safer fungicides
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We report here a convenient pathway for the direct functionalization of glycerol with a dithiocarbamate moiety. This work opens up a cost-efficient and environmentally friendly route to safer fungicides. It should be noted that whereas functionalization of glycerol usually suffers from a lack of selectivity, we show here that our process is fully regioselective.
- De Sousa, Rodolphe,Thurier, Cyril,Len, Christophe,Pouilloux, Yannick,Barrault, Joel,Jerome, Franois
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supporting information; experimental part
p. 1129 - 1132
(2011/06/26)
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