Reaction of Cis–[RuCl2 (DMSO)4 with some Aromatic Thioamides (RCSNHCOR') in Presence Nitric oxide and Pyridine
作者:K. Singh、Pratibha Singh
DOI:10.13005/ojc/340350
日期:2018.6.28
Reactions of RCSNHCOR′(R and R′ are various types of group) with Cis [RuCl2 (DMSO)4] in presence of nitric oxide and pyridine leads to the formation of new complexes of the type cis-[RuCl2(NO)(RCSNHCOR')(py)]+. These cationic complexes were isolated as cis [RuCl2(NO) (RCSNHCOR') (py)] PF6 on reacting with NH4PF6. The complexes were characterised by elemental analysis, spectroscopic (Infrared, UV-Vis)
Synthesis, Characterization and Reaction of New Ruthenium Aromatic Thioamide Nitrosyls with some Nitrogen Donor Ligands
作者:K. Singh
DOI:10.13005/ojc/320426
日期:2016.8.25
Reactions of LH=RCSNHCOOEt (R= 4-tolyl, 1-pyrrolyl, and 2thiophenyl) with RuCl3. 3H2O and NO leads to the formation of diamagnetic compounds of the formula [L2Ru(NO)(Cl)J]. These compounds have been characterised by elemental analysis and IR, UV and Visible and magnetic measurements. The presence of (NO) at 1835-1855-cm-1 indicates a Ru-NO}6 configuration. The substitution of Cl bounded trans to NO
Tin for organic synthesis. 10. Unconventional regiospecific syntheses of aromatic carbonamides and thiocarbonamides by means of tin-mediated Friedel-Crafts reactions
作者:Martin Arnswald、Wilhelm P. Neumann
DOI:10.1021/jo00077a020
日期:1993.12
Friedel-Crafts reactions of stannylarenes 1 with tosyl isocyanate (TsNCO, 2) give N-tosylcarbonamides 3 via ipso substitution of the stannyl group. Thus, unconventionally substituted aromatic carbonamides can be obtained. The combination of the reaction of 1 and 2 with that of 1 and chlorosulfonyl isocyanate (14) allows one-pot syntheses of N-(arylsulfonyl)-substituted aromatic carbonamides with optional substitution patterns on both aromatic rings. The known ipso-specific substitutions of stannylarenes with 14 are extended to bi- and tricyclic arenes as well as to thiophenes 6 and 22. One stannyl group can serve as a leaving group for two aromatic systems, as shown with diaryldialkyltins 29. Also, stannylalkanes such as 27 react with 14 to afford alkylsulfonyl isocyanates and products of further reactions, such as 28. From the reactions of 1 with ethoxycarbonyl isothiocyanate (32), ortho- and meta-substituted aromatic thiocarbonamides 33 which are potential precursors for further syntheses, are accessible. The scope, limitations, and mechanism of these electrophilic substitutions are outlined.
Heterocycles from N-ethoxycarbonylthioamides and dinucleophilic reagents. 2. Five-membered rings containing two heteroatoms at 1,3 positions
作者:Babu George、Eleftherios P. Papadopoulos
DOI:10.1021/jo00423a011
日期:1977.2
4,5-Dihydroimidazoles from Dithiocarboxylic Esters, Thiocarboxamides, or Nitriles