منابع مشابه
The Ortho Effect in Plant Growth-regulators.
Introduction In an earlier publication (2) a comparison was made of the growth regulating activites of various compounds as indicated by the elongation of sections of Avena coleoptiles. From this comparison it was seen that the substitution of various halogen atoms in the phenoxyacetic acid (POA) structure increased its effect on elongation except when both ortho positions were occupied. Also, ...
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ds-Bis(phenyl)bis(triphenylphosphan)platin(II)Verbindungen vom Typ cis-1 hatten ergeben, daß diese regiospezifische [1 — 8], thermisch symmetrieer laubte [9] pericyclische Reaktion am Übergangsme tall [1 —8] sich immer dann durch besonders niedrige Aktivierungs-Enthalpien auszeichnet, wenn der eine Phenylring durch Substituenten X substituiert ist, die die Elektronendichte auf dem unmittelbar...
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Pd(II)-catalysed ortho-arylation of benzylic heterocycles with arylboronic acid pinacol esters (Ar-BPin) via directed C-H bond activation to generate the desired biaryl products is reported. This methodology is efficient and applicable to a wide range of functionalised Ar-BPin and benzylic heterocycles, allowing the direct synthesis of important biaryl motifs in modest to good yield.
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We tested the effect of mono-ortho and di-ortho PCB congeners on northern leopard frog (Rana pipiens) hatching success, survival and sexual development. Embryos and tadpoles were exposed to two levels (0.5 and 50 microg/l) of two PCBs. PCBs 101 and 70 were selected because they were present in amphibians collected in the Fox River-Green Bay ecosystem and they have the theoretical structural req...
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ژورنال
عنوان ژورنال: Journal of Synthetic Organic Chemistry, Japan
سال: 1965
ISSN: 0037-9980,1883-6526
DOI: 10.5059/yukigoseikyokaishi.23.350