439591-36-3Relevant academic research and scientific papers
Synthesis and characterization of gold(III) complexes bearing a picoline-functionalized N-heterocyclic carbene
Topf, Christoph,Hirtenlehner, Christa,Fleck, Michel,List, Manuela,Monkowius, Uwe
, p. 2129 - 2134 (2011)
3-Methyl-1-(2-picolyl)-imidazolium chloride (1) has been synthesized and used as a precursor for the preparation of the (NHC)AgCl complex [NHC = 3-methyl-1-(2-picolyl)imidazol-2-ylidene] (2). Transmetalation of 2 with (tht)AuBr (tht = tetrahydrothiophene) yields the corresponding (NHC)AuBr complex 3, which is further oxidized by Br2 to give the (NHC)AuBr 3 compound 4. Treatment of 4 with one equivalent of solid AgBF 4 affords the [(NHC)AuBr2][BF4] congener 5 as a pale green, crystalline powder. The structure of 4 and 5 were determined by single-crystal X-ray diffraction, revealing for 5 a κ-N-coordination of the AuIII atom by the picolyl nitrogen atom. Further attempts to exchange all bromides by carboxylates results in the reduction to the dimeric AuI compound [(NHC)2Au2][BF4] 2, 6. Copyright
Design and synthesis of basic ionic liquids for the esterification of triterpenic acids
Ressmann, Anna K.,Schneider, Maria,Gaertner, Peter,Weil, Matthias,Bica, Katharina
, p. 139 - 148 (2017/01/17)
Abstract: We present the design and synthesis of Br?nsted-basic ionic liquids and investigate their application in the microwave-assisted esterification of betulinic acid, aiming towards a benign and pyridine-free manufacturing process of the anti-HIV drug, bevirimat. Graphical abstract: [Figure not available: see fulltext.]
