75924-76-4Relevant academic research and scientific papers
Rhodium(I) and iridium(I) complexes containing bidentate phosphine-imidazolyl donor ligands as catalysts for the hydroamination and hydrothiolation of alkynes
Field, Leslie D.,Messerle, Barbara A.,Vuong, Khuong Q.,Turner, Peter
scheme or table, p. 3599 - 3614 (2009/09/07)
A series of novel cationic and neutral rhodium and iridium complexes containing bidentate phosphine-imidazolyl donor ligands of the general formulae [M(ImP)(COD)]BPh4 (M = Rh, ImP = ImP2, 3; ImP1a, 4a; ImP1b, 4b and M = Ir, ImP = ImP2, 5; ImP1a, 6a and ImP1b, 6b), [Ir(ImP)(CO)2]BPh 4 (ImP = ImP2, 7; ImP1a, 8a and ImP1b, 8b), [Rh(ImP1b)(CO) 2]BPh4 (10b) and [M(ImP)(CO)Cl] (M = Rh, ImP = ImP2, 11; ImP1b, 12 and M = Ir, ImP = ImP2, 13; ImP1b, 14) where COD = 1,5-cyclooctadiene, ImP2 = 1-methyl-2-[(2-(diphenylphosphino)ethyl]imidazole, 1; ImP1a = 1-methyl-2-[(diphenylphosphino)methyl]imidazole, 2a and ImP1b = 2-[(diisopropylphosphino)methyl]-1-methylimidazole, 2b were successfully synthesised. The solid state structures of 3, 6a, 11 and 12 were determined by single crystal X-ray diffraction analysis. A number of these complexes are effective as catalysts for the intramolecular hydroamination of 4-pentyn-1-amine to 2-methyl-1-pyrroline. The cationic complexes are significantly more effective than analogous neutral complexes. The cationic iridium complex 8b, containing the phosphine-imidazolyl ligand with the bulky isopropyl groups on the phosphorus donor, is more efficient than analogous complexes with the phenyl substituents on the phosphorus donor atom, 7 and 8a. The complexes 7-8b are also moderately effective in catalysing the addition of thiophenol to a range of terminal alkynes. In contrast to the hydroamination reaction, placement of the isopropyl group on the phosphorus donor leads to a decrease in the reactivity of the resulting metal complexes as catalysts for the hydrothiolation reaction.
Hydroalumination of thioacetylenes: A versatile generation and reactions of α-aluminate sulfides intermediates
Guerrero Jr.,Dabdoub,Marques,Wosch,Baroni,Ferreira
experimental part, p. 4379 - 4394 (2009/04/11)
Hydroalumination of thioacetylenes using DIBAL-H and lithium di-(isobutyl)-n-(butyl)-aluminate hydride (Zweifel's reagent), followed by addition of water, furnished exclusively the (Z)- and (E)-vinyl sulfides, respectively. The regio- and stereochemistry
Mild, efficient and highly stereoselective synthesis of (Z)-vinyl chalcogenides from vinyl bromides catalyzed by copper(I) in ionic liquids based on amino acids
Wang, Zhiming,Mo, Hanjie,Bao, Weiliang
, p. 91 - 94 (2008/03/13)
A method for the synthesis of (Z)-vinyl chalcogenides by the coupling of vinyl bromides with thiols or diphenyl diselenide using copper(l) salts as catalysts in ionic liquids based on amino acids is reported. The desired vinyl chalcogenides were obtained
Rhodium(I) and iridium(I) complexes with bidentate N,N and P,N ligands as catalysts for the hydrothiolation of alkynes
Burling, Suzanne,Field, Leslie D.,Messerle, Barbara A.,Vuong, Khuong Q.,Turner, Peter
, p. 4181 - 4191 (2007/10/03)
Cationic iridium(I), rhodium(I) complexes containing bis(1-methylimidazol-2-yl)methane, bim, [M(bim)(CO)2]BPh4 (M = Ir (1), Rh (2)); bis(pyrazol-1-yl)methane, bpm, [M(bpm)(CO)2]BPh4 (M = Ir (3), Rh (4)) have bee
STEREOSPECIFIC SYNTHESIS OF ALKENYL SULPHIDES BY CROSS-COUPLING REACTIONS OF SECONDARY ALKYL GRIGNARD REAGENTS WITH Z- OR E-1-BROMO-2-PHENYLTHIOETHENE IN THE PRESENCE OF TRANSITION METAL CATALYSTS
Fiandanese, Vito,Miccoli, Giovanni,Naso, Francesco,Ronzini, Ludovico
, p. 343 - 348 (2007/10/02)
Z- and E-1-bromo-2-phenylthioethenes were cross-coupled stereospecifically with s-alkyl Grignard reagents in the presence of a series of NiII, PdII, or FeIII catalysts with the aim of finding a catalyst which would not cau
