A model for a solvent-free synthetic organic research laboratory: click-mechanosynthesis and structural characterization of thioureas without bulk solvents
Nickel(II) complexes of di- and tri-substituted thiourea mono- and di-anions
作者:Ho Ying Yuen、William Henderson、Allen G. Oliver
DOI:10.1016/j.ica.2010.12.011
日期:2011.3
Abstract Reaction of nickel(II) acetate, 1,2-bis(diphenylphosphino)ethane (dppe), and a di- or tri-substituted thiourea R1NHC(S)R2R3 (R3 = H or alkyl) with trimethylamine in hot methanol gave cationic nickel(II) complexes containing N,S-chelated thiourea monoanion ligands [NiSC(NR2R3)NR1}(dppe)]+, which can be readily isolated as their BPh4− salts. The X-ray crystal structure of [NiSC(NMe2)NPh}(dppe)]+BPh4−
A ligand free copper(II) catalyst is as effective as a ligand assisted Pd(II) catalyst towards intramolecular C–S bond formation via C–H functionalization
作者:Arghya Banerjee、Sourav Kumar Santra、Saroj Kumar Rout、Bhisma K. Patel
DOI:10.1016/j.tet.2013.08.025
日期:2013.10
Copper(I) catalysts are usually ineffective on the other hand Pd(II) catalysts are quite effective in promoting intramolecular sp2 C–H functionalization (C–S bond formation). Herein, we have developed a ligand assisted Pd(II) catalyzed C–S bond formation via C–H activation from arylthioureas leading to the formation of 2-aminobenzothiazoles for substrates bearing electron donating (EDG) groups in the
Cycloaurated gold(III) complexes with monoanionic thiourea ligands
作者:Tiffany S. Smith、William Henderson、Brian K. Nicholson
DOI:10.1016/j.ica.2013.07.027
日期:2013.11
Using a simple one-pot procedure, reaction of cycloaurated gold(III) dihalide complexes [LAuCl2] (L = 2-benzylpyridyl, 2-anilinopyridyl) with trisubstituted thioureas PhNHC(S)NR2 (R = Me, Cy) and Me3N in methanol, followed by addition of excess NaBPh4 gave the salts [LAuSC(= NR2)NPh}]+BPh4- containing N,S-chelated thiourea monoanion ligands. The compounds were obtained in good yields, and were characterised by ESI MS, elemental microanalysis and in two cases by X-ray structure determinations. The series of complexes was extended by additional microscale reactions of LAuCl2 complexes (L = 2-benzyl-pyridyl, 2-anilinopyridyl, 2-benzoylpyridyl or picolinamide) with a wide range of trisubstituted thioureas, with products identified by ESI MS. (c) 2013 Elsevier B.V. All rights reserved.
Synthesis, characterisation, supramolecular aggregation and biological activity of phosphine gold(I) complexes with monoanionic thiourea ligands
作者:William Henderson、Brian K. Nicholson、Edward R.T. Tiekink
DOI:10.1016/j.ica.2005.07.046
日期:2006.1
A series of phosphine gold(I) complexes containing monoanionic thiourea ligands has been synthesised by reaction of the appropriate precursor chloro complex, Ph3PAuCl, Cy3PAuCl, dppf(AuCl)(2) [dppf = Fe(eta(5)-C5H4PPh2)(2)] or dppe(AuCI)2 (dppe = Ph2PCH2CH2PPh2) with the thiourea and Me3N base in methanol solution. The complexes have been fully characterised by elemental analysis, NMR spectrometry, electrospray mass spectrometry, and in several cases, by single-crystal X-ray diffraction studies. The crystallographic studies show that the ligands coordinate as a thiolate in each case with systematic variations in geometric parameters being readily ascribed to the influence of the N-bound substituents. In four of the structures, discernable supramolecular aggregation patterns are evident, leading to loosely associated dimers or chain motifs, the latter mediated by either An...S, N-H...N or C-H...O interactions. Cytotoxicity data, against the P388 leukemia cell line, and anti-microbial data are also reported. (c) 2005 Elsevier B.V. All rights reserved.
Willemse, J.; Bosman, W. P.; Noordik, J. H., Recueil des Travaux Chimiques des Pays-Bas, 1981, vol. 100, # 6, p. 240 - 243
作者:Willemse, J.、Bosman, W. P.、Noordik, J. H.、Cras, J. A.