- Biocatalytic synthesis of dihydroxynaphthoic acids by cytochrome P450 CYP199A2
-
CYP199A2, a bacterial P450 monooxygenase from Rhodopseudomonas palustris, was found to exhibit oxidation activity towards three hydroxynaphthoic acids. Whole cells of the recombinant Escherichia coli strain expressing CYP199A2 efficiently catalyzed the re
- Furuya, Toshiki,Kino, Kuniki
-
experimental part
p. 2797 - 2799
(2010/09/17)
-
- Flame-resistant polycarbonates containing units deriving from halogenated pyrimidine compounds in their polymer chain
-
Flame-resistant thermoplastic branched polycarbonates of high molecular weight are prepared from: (1) a carbonate precursor; (2) at least one dihydroxyaromatic compound of formula: where:, R is a single bond, or a substituted or non-substituted linear or branched C1-C5 alkylene radical, or a group chosen from O, S, SO2 and CO;, X and Y, which may be the same or different, are H or CH3;, m and n, which may be the same or different, are whole numbers from 1 to 4; (3) at last one halogenated pyrimidine compound of formula: where: R2, R3, R4, which may be the same or different, are chlorine or bromine or hydrogen, on condition that at least one is chlorine or bromine;, R1 is chlorine or bromine, or a radical of formula: where Z is NH or S or O; (4) at least one polyfunctional organic compound as branching agent, characterized by possessing at least three equal or different groups chosen from the groups OH, COOH, COCl and SO2Cl.
- -
-
-
- 1,8,17,24-Tetraoxa(2,6)naphthalenophane-3,5,19,21-tetrayne-10,13-dicarboxylic Acid Derivatives, Novel Complexors of Aromatic Guests
-
Synthesis and complexation behavior of the title molecules are described.Study of aromatic solvent induced shifts of these molecules support the contention that their large cavity can accomodate aromatic rings.The behavior of acid 1a in water suggests that this effect enhanced in aqueous medium, as is expected for formation of hydrophobic inclusion complexes.In contrast to the rigid naphthalenophanes (1), their saturated derivatives (7) exist in a collapsed conformation and do not incorporate aromatic guests.
- Jarvi, Esa T.,Whitlock, Howard W.
-
p. 7196 - 7204
(2007/10/02)
-
