Anbazhagan, Mariappan; Reddy, T. Indrasena; Rajappa, Srinivasachari, Journal of the Chemical Society. Perkin transactions I, 1997, # 11, p. 1623 - 1627
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
Commercially useful aromatic urea herbicides were synthesized in good yields from lithium amides of aromatic amines with thiocarbamates, which were prepared by the selenium-assistedcarbonylation of secondary amines with carbonmonoxide and sulfur under mild conditions.
A general procedure for the synthesis of alkyl and aryl alkylcarbamates starting from the corresponding S-methyl N-alkyl-thiocarbamates is described. This procedure consists of three steps that are carried out in a one-pot fashion, without isolating the intermediate N-alkylcarbamoyl chlorides or alkyl isocyanates. All the target products were obtained in high yields (16 examples, average yield 91%)
A New One-pot Synthesis of Thiocarbamates from Isocyanates and Disulfides in the Presence of Zn/AlCl<sub>3</sub>System
作者:Barahman Movassagh、Yousef Zakinezhad
DOI:10.1246/cl.2005.1330
日期:2005.10
A novel method has been developed for the synthesis of S-alkyl(aryl) thiocarbamates. The route involves, first, the formation of zinc thiolates by reductive cleavage of disulfides in the presence o...
A General, Facile, and Safe Procedure for the Preparation of <i>S</i>-Methyl <i>N</i>-Alkylthiocarbamates by Methylthiocarbonylation of Primary Aliphatic Amines with <i>S</i>,<i>S</i>-Dimethyl Dithiocarbonate
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.