Compound 9‘, in the presence of ATP, then condenses with (S)-2-hydroxyglutaric acid to form demethylated H2methanopterin, a known precursor to methanopterin. The occurrence of this pathway was confirmed by (a) the chemical and/or biochemical synthesis of most of the proposed intermediates, ...
The NMR spectra of this compound could not be observed owing to its paramagnetic nature. High-resolution mass spectrometry (HR-MS) ESI-MS): m/z ¼ 809.7650, calcd for (C30H18Br4N4Ni) þ ¼ 809.7613 [(M) þ ]. Ni(II) meso-diphenylnorcorrole 3b. To a mixture of meso-phenyl...
Naphthalene was the only compound present in all ten samples, while acenaphthylene, perylene, benzo(ghi)perylene and dibenzo(ah)anthracene were always below the detection limit. Total PAH concentrations in samples from within the cave (samples A to C) are dominated by naphthalene, chrysene and ...
Aromatic and non—aromatic bridged annulenes1609Recently an analog of the previously mentioned compound was synthesized (34),tricyclo(9 .4 .l.l '9)heptadecaheptaenylium tetrafluoroborate. No disorderwas present in the crystal of this derivative and so the geometry of the15 annulenium cation was...
…the parent carcinogen [compound administered] might be converted in the body to a derivative which could be properly considered as the primary carcinogen. Furthermore, As a working hypothesis, we have considered that at least one of the primary carcinogens is eitherp-dimethylaminoazobenzene itself...
spectrum of the compound fully corresponds to that of 10 and also to that of the hydro-carbon 19, to be described later. The two central perimeter protons give rise to a singlet, located at r 2.25, while the eight outer perimeter protons appear as a multiplet at r 2.2-2.7, which can ...
Compound 4-Lu is analogous to 2-Lu, with one end ring coordinating to the two lutetium fragments (Supplementary Fig. S99). The confirmed features of the bridging arenes, namely quadruple reduction, rigid coordination mode and the relative stability, over the doubly reduced complexes brought up ...
Meisenheimer intermediates can be isolated and characterized. However, if heated, the compound goes on to form the final nucleophilic aromatic substitution product. This is verysuggestive,to say the least. 7. TheMechanism of Nucleophilic Aromatic Substitution ...
but also bears a lone pair which allows transmission through the molecule. The conductance of model non-bridged compound5–2Hpis reduced because of the dihedral angle between the two phenyl units. Model compound10–2Hmshows no conductance within the detection limit of the MCBJ setup. This is...
Preferably, a flame retardant system is present, which is usually a combination of two types of compounds, namely x) a brominated aliphatic, cycloaliphatic, aromatic or polymeric compound containing at least 50 wt. % of bromine, and a second compound (so called synergistic compound, y) which ...