Products from Enzyme-Catalyzed Oxidations of Norcarenes
作者:Martin Newcomb、Dharmika S. P. Lansakara-P.、Hye-Yeong Kim、R. Esala P. Chandrasena、Stephen J. Lippard、Laurance G. Beauvais、Leslie J. Murray、Viviana Izzo、Paul F. Hollenberg、Minor J. Coon
DOI:10.1021/jo061865j
日期:2007.2.1
Recent studies revealed that norcarane (bicyclo[4.1.0]heptane) is oxidized to 2-norcarene (bicyclo[4.1.0]-hept-2-ene) and 3-norcarene (bicyclo[4.1.0]hept-3-ene) by iron-containing enzymes and that secondary oxidation products from the norcarenes complicate mechanistic probe studies employing norcarane as the substrate (Newcomb, M.; Chandrasena, R. E. P.; Lansakara-P., D. S. P.; Kim, H.-Y.; Lippard
Umsetzungen des Cyclohex-3-en-carbaldehyd-p-toluolsulfonylhydrazons
作者:M. Rey、R. Begrich、W. Kirmse、Andr� S. Dreiding
DOI:10.1002/hlca.19680510502
日期:1968.7.10
The vacuum thermolysis (80–90°) of the sodium salt of cyclohex-3-ene-carbaldehyde p-toluenesulfonylhydrazone (1) in silicone oil gave diazomethyl-cyclohex-3-ene (2). Pyrolytic and photolytic decomposition of this diazo compound 2 lead to methylenecyclohex-3-ene (5) and bicyclo [4.1.0]hept-2-ene (6) (about 3:1), while the CuCl catalyzed cleavage yielded only 5. The postulated carbene mechanism should
Organic photochemistry in the far-ultraviolet: unusual wavelength dependence in solution-phase irradiations
作者:Ra Srinivasan、Thomas Baum、Karen Brown、Jose Ors、Lloyd S. White、Angelo R. Rossi、Gary A. Epling
DOI:10.1039/c39810000973
日期:——
In the region from 185 to 215 nm certain compounds show extreme selectivity in their photodecomposition modes in solution depending on the wavelength even though such compounds possess only one intense absorption in this region.
Desaturase Reactions Complicate the Use of Norcarane as a Mechanistic Probe. Unraveling the Mixture of Twenty-Plus Products Formed in Enzyme-Catalyzed Oxidations of Norcarane
作者:Martin Newcomb、R. Esala P. Chandrasena、Dharmika S. P. Lansakara-P.、Hye-Yeong Kim、Stephen J. Lippard、Laurance G. Beauvais、Leslie J. Murray、Viviana Izzo、Paul F. Hollenberg、Minor J. Coon
DOI:10.1021/jo061864r
日期:2007.2.1
Norcarane, bicyclo[4.1.0]heptane, has been widely used as a mechanistic probe in studies of oxidations catalyzed by several iron-containing enzymes. We report here that, in addition to oxygenated products, norcarane is also oxidized by iron-containing enzymes in desaturase reactions that give 2-norcarene and 3-norcarene. Furthermore, secondary products from further oxidation reactions of the norcarenes