Abstract
A general procedure is reported for the selective preparation of S -methyl N -alkylthiocarbamates by methylthiocarbonylation of primary aliphatic amines, employing
S ,S -dimethyl dithiocarbonate as a phosgene substitute. The reactions are carried out
in water at room temperature (20-25 °C), with S ,S -dimethyl dithiocarbonate/amine ratios varying between 1:1.2 and 1:2, and with quantitative
recovery of the excess amine. The target products are obtained in exceptionally high
yields (generally >95%) and with very high purity (generally >99.5%). Also to be noted
is the complete chemoselectivity of the reactions, which can be carried out in the
presence of hydroxy or aminophenyl groups.
Key words
thiocarbamates - thiocarbonylation - dithiocarbonates - amines - chemoselectivity
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