A reaction of dithiocarbamic acidsalts with carbonyl compounds was investigated for the first time in the presence of BF3·OEt2. The reaction is temperature dependent and gives gem-bis(dithiocarbamates) at 35–45 °C as a molecule with high equivalents of dithiocarbamate groups. At lower temperatures (15–20 °C), the 2-iminium-1,3-dithietane is obtained as the only product. The structure of a 2-iminium-1
Cu-mediated one-pot three-component synthesis of 3-N-substituted 1,4,2-benzodithiazine 1,1-dioxide derivatives
作者:Wei Dong、Zemei Ge、Xin Wang、Ridong Li、Runtao Li
DOI:10.1016/j.tet.2020.131354
日期:2020.7
A novel and efficient copper-catalyzed one-pot procedure for the synthesis of 3-N-substituted 1,4,2-benzodithiazine 1,1-dioxide derivatives from 2-halobenzenesulfonamides, amines and CS2 is described. The reaction proceeds through Ullmann-type S-arylation, intramolecular addition of NH2 with CS and dehydrosulfide, which provides a new and useful strategy for construction of cyclic aromatic sulfonamides
A catalyst-free 1,4-Michael-type reaction of in situ generated ortho-quinone methides (o-QMs) with dithiocarbamic acid salts in water
作者:Fezzeh Aryanasab、Meisam Shabanian
DOI:10.1007/s13738-019-01644-z
日期:2019.8
catalyst-free conjugate addition of dithiocarbamicacid salts to in situ generated ortho-quinone methides (o-QMs) was investigated for the first time. Several dithiocarbamate derivatives of 4-hydroxycoumarine, 4-hydroxypyrone and 2-naphthol were synthesized in moderate-to-good yields in water at room temperature. Graphical abstract Catalyst-free addition of dithiocarbamicacid salts to in situ generated o-QMs
A NEW APPROACH TO PREPARATION OF 1,3-DITHIOLIUM SALTS
作者:Mihail Lucian Birsa
DOI:10.1081/scc-100104016
日期:2001.1.1
The synthesis of 4-(3′,5′-diiodo-2′-hydroxy-phenyl)- 2-(N,N-dialkylamino)-1,3-dithiolium perchlorates has been performed by cyclization of the corresponding N,N-dialkylaminocarbodithioates in presence of the “superacid” mixture P2O5–CH3SO3H.
Synthesis and Cyclization Reaction of 2-(Hydroxyimino)alkyl<i>N,N</i>-Dialkylthiocarbamates,<i>S</i>-[2-(Hydroxyimino)alkyl]<i>O</i>-Methyl Dithiocarbonate, and Alkyl 2-(Hydroxyimino)alkyl Trithiocarbonates
2-(Hydroxyimino)alkyl dialkyldithiocarbamates and alkyl 2-(hydroxyimino)alkyl trithiocarbonates react with tosyl isocyanate as dehydrating agent to give bis(4-isothiazolyl) disulfides in moderate yields. However, treatment of S-[2-(hydroxyimino)phenylethyl] O-methyl dithiocarbonate with tosyl isocyanate affords a novel heterocycle 3-phenyl-4H-1,5,2-oxathiazine-6-thione, in 49% yield.