Rykowski, Direct synthesis of pyrazolo[4,3-e][1,2,4]
triazine derivatives from oximes of 5-acyl and 5-formyl-1,2,4-
triazines.
The product separated as bright yellow solid, which was filtered, dried and washed with methanol to obtain pure
triazines (CP-1, CP-2, CP-6).
5% of 579 pregnant women, and dealkylated and identified hydroxylated
triazine metabolites in 20% and 40% of samples, respectively.
Although
triazines are aromatic compounds, the resonance energy is much lower than in benzene and electrophilic aromatic substitution is difficult but nucleophilic aromatic substitution more frequent.
The difference between applied
triazines and the amount recovered in the soil profile on day 1 was attributed to interception or absorption by plant material (lsensee and Sadeghi 1994).
The four accompanying graphs show the performance of PR-25 in retarding color development compared with traditional uv absorbers or the newer
triazines.
He maintains that the phasing out of the broad-acting
triazine family of herbicides and their replacement by more weed-specific chemicals is almost certain to lead to greater resistance to chemical herbicides.
Figures 1-4 (courtesy of work done in cooperation with the Ministry of the Environment, Drinking Water Section, Toronto) illustrate the appeal and practicality of this course of action with total ion chromatograms, peak tables and representative extracted ion chromatograms with signal to noise and full scan spectra for low ppb level organochlorine, organophosphate,
triazine, cholorophenol and phenoxyacid pesticides, insecticides and herbicides.
1a), which are further connected to two-dimensionalarchitecture by p-p stacking interactions betweenphenyl rings and
triazine rings.
Though these catalysts have different catalytic effects, their catalytic mechanism is to catalyze the formation of
triazine rings as shown in Scheme 1 (12).
Atrazine, a
triazine herbicide used primarily in corn production (Frank and Sirons 1979), is the most common pesticide contaminant of groundwater and surface water (Fenelon and Moore 1998; Hennion M, Pichon V, Legeay P, Cohen M, unpublished data; Kolpin et al.
Atrazine and prometryne belong to the most widely used group of herbicides, the
triazines.
