606-59-7Relevant academic research and scientific papers
Plectosphaeroic acids A, B, and C, Lndoleamine 2,3-dioxygenase inhibitors produced in culture by a marine isolate of the fungus plectosphaerella cucumerina
Carr, Gavin,Tay, Wendy,Bottriell, Helen,Andersen, Sarah K.,Mauk, A. Grant,Andersen, Raymond J.
, p. 2996 - 2999 (2009)
Laboratory cultures of the fungus Plectosphaerella cucumerina obtained from marine sediments collected in Barkley Sound, British Columbia, yielded the novel alkaloids plectosphaeroic acids A (1) to C (3). The alkaloids 1-3 are inhibitors of indoleamine 2,3-dioxygenase (IDO).
Catalytic oxidation of o-aminophenols and aromatic amines by mushroom tyrosinase
Munoz-Munoz, Jose Luis,Garcia-Molina, Francisco,Garcia-Ruiz, Pedro Antonio,Varon, Ramon,Tudela, Jose,Rodriguez-Lopez, Jose N.,Garcia-Canovas, Francisco
, p. 1974 - 1983 (2011)
The kinetics of tyrosinase acting on o-aminophenols and aromatic amines as substrates was studied. The catalytic constants of aromatic monoamines and o-diamines were both low, these results are consistent with our previous mechanism in which the slow step is the transfer of a proton by a hydroxyl to the peroxide in oxy-tyrosinase (Fenoll et al., Biochem. J. 380 (2004) 643-650). In the case of o-aminophenols, the hydroxyl group indirectly cooperates in the transfer of the proton and consequently the catalytic constants in the action of tyrosinase on these compounds are higher. In the case of aromatic monoamines, the Michaelis constants are of the same order of magnitude than for monophenols, which suggests that the monophenols bind better (higher binding constant) to the enzyme to facilitate the π-π interactions between the aromatic ring and a possible histidine of the active site. In the case of aromatic o-diamines, both the catalytic and Michaelis constants are low, the values of the catalytic constants being lower than those of the corresponding o-diphenols. The values of the Michaelis constants of the aromatic o-diamines are slightly lower than those of their corresponding o-diphenols, confirming that the aromatic o-diamines bind less well (lower binding constant) to the enzyme.
Aminophenoxazinones as inhibitors of indoleamine 2,3-dioxygenase (IDO). synthesis of exfoliazone and chandrananimycin A
Pasceri, Raffaele,Siegel, David,Ross, David,Moody, Christopher J.
, p. 3310 - 3317 (2013/06/04)
A range of 2-aminophenoxazin-3-ones has been prepared by oxidative cyclocondensation of 2-aminophenols, including the natural products exfoliazone and chandrananimycin A, both synthesized for the first time. The compounds were evaluated for their ability
Enantioselective total syntheses of plectosphaeroic acids B and C
Jabri, Salman Y.,Overman, Larry E.
, p. 8766 - 8788 (2013/09/24)
Evolution of the synthetic strategy that culminated in the first total syntheses of the structurally unique plectosphaeroic acids B (2) and C (3) is described. The successful enantioselective route to (+)-2 and (+)-3 proceeds in 6 and 11 steps from the kn
Catalytic oxidative cyclocondensation of o-aminophenols to 2-amino-3H-phenoxazin-3-ones
Giurg, Miroslaw,Piekielska, Katarzyna,Gebala, Magdalena,Ditkowski, Bartosz,Wolanski, Marcin,Peczynska-Czoch, Wanda,Mlochowski, Jacek
, p. 1779 - 1789 (2008/02/02)
The catalytic oxidative cyclocondensation of the o-aminophenols 1a-f was investigated. The oxidants used were air/laccase, H2O2/horseradish peroxidase, H2O2/ebselen (3), and TBHP/diphenyl diselenide 4. The products obtained were 2-amino-3H-phenoxazin-3-on
OXIDATION OF ORTHO-AMINOPHENOLS III. THE JOINT OXIDATION OF DERIVATIVES OF 3-HYDROXYANTHRANILIC ACID DIFFERING IN THE SUBSTITUENTS AT POSITION 4
Korshunova, Z. I.,Popova, E. B.,Glibin, E. N.,Ginzburg, O. F.
, p. 314 - 319 (2007/10/02)
The joint oxidation of 3-hydroxyanthranilic acid and its 4-methoxy-substituted derivative and also the amides of 3-hydroxyanthranilic acid and the amide of 4-chloro-3-hydroxyanthranilic acid with the amides of 4-methyl-3-hydroxyanthranilic acid always lea
Triphenodioxazine-1,8-dicarboxylic Acid as an Oxidation Product of 3-Hydroxyanthranilic Acid
Hick, Larry A.,Manthey, Michael K.,Truscott, Roger J. W.
, p. 1157 - 1160 (2007/10/02)
The oxidation of 3-hydroxyanthranilic acid (3OHA) 1 by aqueous buffered potassium ferricyanide produces a number of coloured compounds.These include cinnabarinic acid 2 (yellow), a p-quinone dimer 3 (red) and 9-carboxy-2-hydroxy-3H-phenoxazin-3-one 4 (bro
Autoxidation of 3-Hydroxyanthranilic Acid
Manthey, Michael K.,Pyne, Stephen G.,Truscott, Roger J. W.
, p. 1486 - 1488 (2007/10/02)
3-Hydroxyanthranilic acid in aqueous solution can be autoxidized to yield two different products depending on the pH at which the oxidation is performed.At acidic pH the formation of cinnabarinic acid is favored while at alkaline pHs the major product is
