η-C5H5(CO)LFe-substituted imidates of acrylic acid. Synthesis and structure

Oxidations catalyzed by osmium compounds. Part 1: Efficient alkane oxidation with peroxides catalyzed by an olefin carbonyl osmium(0) complex

“…Complex 1 was synthesized as described previously [83] starting from Os 3 (CO) 11 -(MeCN) and trans-1,4-diphenylbut-2-ene-1,4-dione. The structure of 1 was determined by the X-ray method [83]. Acetonitrile was used as a solvent and reactions were carried out in air at 50-70°C.…”

“…Complex 1 was prepared in accordance with the method described previously [83]. Carbonyl cluster containing acetonitrile ligand, Os 3 (CO) 11 (MeCN) (2) was synthesized [102] starting from Os 3 (CO) 12 (0.407 g, 0.45 mmol).…”

“…160°C (with decomposition). The compound was characterized by elemental analysis, 1 H and 13 C NMR, IR spectra and X-ray analysis [83].…”

Oxidation of alcohols with hydrogen peroxide catalyzed by soluble iron and osmium derivatives

“…For example, the oxidation of 0.1 mL of alcohol 1 (conditions: catalyst, 2×10 -4 M; H 2 O 2 , 0.5 mL; MeCN, 0.3 mL; 50ºC; 3 h) yielded 2 (28%) and 3 (8%) and the reaction of isopropanol (0.1 mL) under the same conditions gave acetone with 58% yield based on initial alcohol. Another complex containing the triosmium carbonyl fragment, namely (2,3-η-1,4-diphenylbut-2-en-1,4-dione)undecacarbonyl triangulotriosmium (for synthesis, see [51]), which has been shown to be very active in alkane oxidations with peroxides [52], exhibited a relatively low activity in the oxidation of 1 (at [catalyst] = 1×10 -4 M, conversion was only 17% and aldehyde 2 was the sole product). However, the efficiency was improved when the catalyst is used in a higher concentration (1×10 -3 M) and bipy (5×10 -2 M) is added.…”

Fe Organoiron Compounds Part B13

“…The compounds in Table 5 The methods used to prepare the compounds in Table 5 [45,99]) in THF usually for several hours at room temperature [6,42,44,47,78,86,90,136,148,154], at O°C to room temperature [13,80,86,94,114] followed by warming to 60°C [2], at -70°C to room temperature [16,127] and further at 50 to 60°C [105,106], or at -78°C to room temperature [10,22,45,67,86,99,166]. After solvent removal the residue is generally worked up by chromatography on Al 2 0 3 .…”