Novel synthesis of S-alkyl thiocarbamates from amines, carbon monoxide, elemental sulfur, and alkyl halides in the presence of a selenium catalyst
作者:Takumi Mizuno、Ikuzo Nishiguchi、Noboru Sonoda
DOI:10.1016/s0040-4020(01)85637-4
日期:1994.1
thiocarbamates. On the basis of the high catalytic activity of selenium for carbonylation of amines with carbonmonoxide in addition to these important findings, a convenient new method for synthesis of S-alkyl thiocarbamates was developed through the carbonylation of amines with carbonmonoxide and elemental sulfur in the presence of a selenium catalyst under mild conditions followed by alkylation of ammonium
Oxidation of dithiocarbamates and synthesis of a stable sulfine
作者:David Chevrie、Patrick Metzner
DOI:10.1016/s0040-4039(98)02033-4
日期:1998.12
Investigation of the oxidation reaction of various dithiocarbamates demonstrated that the corresponding sulfines (S-oxides) are formed. Though their stabilities are very moderate, a number of sulfines could be isolated andv characterised. When left at ambient temperature they decomposed to thiolocarbamates and dithiocarbamates. The sulfines from secondary dithiocarbamates led to disulfides which formation
Synthesis of S-alkyl and S-aryl thiocarbamates, one-pot two-step general synthesis
申请人:The United States of America as represented by the Secretary of the Navy
公开号:US06686494B1
公开(公告)日:2004-02-03
A method for preparing S-alkyl and S-aryl thiocarbamates comprising reacting a precursor thiol reagent with trichloroacetyl chloride to produce an S-alkyl and S-aryl trichloroacetyl thioester intermediate, which is reacted with an amine to yield the corresponding thiocarbamate product. Also disclosed is the method for preparing S-alkyl and S-aryl thiocarbamates comprising reacting an amine with trichloroacetyl chloride to produce a trichloroacetamide intermediate, which is then reacted with the precursor thiol to yield the corresponding thiocarbamate product.
the synthesis of thiocarbamates has been developed. When dialkyl or diaryl disulfides were allowed to react with secondary amines and carbonmonoxide in the presence of a catalytic amount of a palladium complex, the thiocarbamates were obtained in moderate to good yields. In contrast to that of secondary amines, in the reaction of a primary amine, no formation of thiocarbamate was confirmed, but urea
Efficient synthesis of S-alkyl thiocarbamates was developed. The key step of this synthetic method is a conversion of carbamoyl lithium, generated from lithium dialkylamide and carbon monoxide, to lithium thiocarbamate by addition of elemental sulfur.