394-31-0Relevant articles and documents
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Brenans,Prost
, p. 1286 (1924)
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Catalysis and mechanistic studies of ruthenium and osmium on synthesis of anthranilic acids
Karthikeyan,Jagadeesh, Rajenahally V.,Sree Sandhya,Puttaswamy,Nithya,Kumar, S. Senthil,Bhagat
experimental part, p. 34 - 46 (2011/09/16)
Ruthenium, osmium and ruthenium + osmium catalyzed synthetic methodology was developed for the synthesis of anthranilic acids from indoles in good to excellent yields using bromamine-B in alkaline acetonitrile-water (1:1) at 313 K. Detailed catalysis studies of ruthenium, osmium and the mixture of both were carried out for the synthetic reactions. The positive synergistic catalytic activity of Ru(III) + Os(VIII) was observed to a large extent with the activity greater than the sum of their separate catalytic activities. Detailed kinetic and mechanistic investigations for each catalyzed reactions were carried out. The kinetic pattern and mechanistic picture of each catalyzed reaction were found to be different for each catalyst and to obey the underlying rate laws: rate = k[BAB]t[Indole][Ru(III)]x[OH-] y rate = k[BAB]t[Indole][Os(VIII)][OH-] y rate = k[BAB]t[Indole]o[Ru(III) + Os(VIII)][OH-]y where, x, y Os(VIII) > Ru(III). This trend may be attributed to the different d-electronic configuration of the catalysts. The proposed mechanisms and the rigorous kinetic models derived give results that fit well with the experimental data in each catalyzed reaction. Copyright
Catalytic Cleavage of Active Phosphate and Ester Substrates by Iodoso- and Iodoxybenzoates
Moss, Robert A.,Alwis, K. W.,Shin, Jae-Sup
, p. 2651 - 2655 (2007/10/02)
p-Nitrophenyl acetate, p-nitrophenyl hexanoate, and p-nitrophenyl diphenyl phosphate (PNPDPP) were cleaved by o-iodosobenzoate, o-iodoxybenzoate, and 5-(n-octyloxy)-2-iodosobenzoate (3) in aqueous micellar cetyltrimethylammonium chloride solutions at pH 8.The system 3/CTACl was the best catalyst and PNPDPP was the most reactive substrate.In a remarkably rapid hydrolytic reaction at 25 deg C, 1.0*10-5 M PNPDPP was cleaved by 7.14*10-5 M 3 in 2.0*10-4 M CTACl with kφ=1.04 s-1.Experiments in which > demonstrated that the catalyst "turned over"; i.e., degradation of an intermediate phosphate was not rate limiting.