(p, p 9n) - (d, 5n)

Keller, Κ. A.; Lange, J.; Münzel, H.; Pfennig, G.

doi:10.1007/10201098_10

Cited by 3 publications

(3 citation statements)

References 84 publications

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“…TT, nieasiirements have heen realized with an apparatus made in our laboratory: froin 77 to 500 K at Torr pressure after 77 K irradiation [TL cleuvuge pseudocell curves a ) ; from 290 to 750 K a t normal pressure (dry N, or air) after 290 K irradiation (TL curves b) [14]. The crystal temperature is checked with an iron-const antan or chromel-alixmel thermocouple fixed under the sample placed in R copper or silver heating block.…”

Section: Measurenwntsmentioning

confidence: 99%

On some luminescent and optical properties of synthetic calcite single crystals

Lapraz

Iacconi

1976

Phys. Stat. Sol. (a)

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The nature of trapping and emission centers in Mn‐ and Pb‐activated calcite (CaCO3) is investigated with respect to thermoluminescence (TL) and optical absorption, between 77 and 750 K, after 253.7 nm UV‐ and X‐irradiation, using single crystals grown by hydro‐thermal method. Mn is responsible for the emission band at 620 nm, Pb at 300 nm; another, very weak, emission is observed about 450 nm. The importance of colour centres for the TL process in calcite is discussed. Comparisons are made with natural as well as other synthetic crystals.

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Section: Measurenwntsmentioning

confidence: 99%

On some luminescent and optical properties of synthetic calcite single crystals

Lapraz

Iacconi

1976

Phys. Stat. Sol. (a)

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“…The phenanthridine and hydrophenanthridine structural motifs are the core of many natural products with pharmacological relevance (Figure ), − such as ethidium, , trispheridine, fagaronine, and lycorane-type alkaloids (α-lycorane, lycorine, and fortucine) . Therefore, a number of synthetic methods for the construction of these frameworks have been reported. − Generally, these methods rely on the intramolecular C–N or C–C bond formation to construct the central pyridine ring under either radical cyclization conditions or transition metal catalysis by using 2-isocyanobiphenyls, biaryl-2-acyl oximes, or other biaryl compounds as the starting materials.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Control of Rh(III)-Catalyzed Annulation of C–H Bonds with Quinones: Chemoselective Synthesis of Hydrophenanthridinones and Phenanthridinones

et al. 2016

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A temperature-dependent redox-neutral Rh(III)-catalyzed C-H bond annulation of N-methoxybenzamides with quinones was developed for the chemoselective synthesis of hydrophenanthridinones and phenanthridinones. This reaction involves an Rh(III)-catalyzed C-H bond functionalization and a subsequent cyclization through the directing group nucleophilic addition to the carbonyl group at room temperature.

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“…For example, nitidine and fagaronine belong to a class of phenanthridine alkaloids, which display activity against leukemia . Consequently, methods for efficient and selective synthesis of phenanthridine derivatives could serve as important tools in medicinal chemistry and material science . Among many possible approaches to the phenanthridine skeleton, those involving closure of the central ring through intramolecular C–C or C–N bond formation of an ortho -functionalized biaryl precursor are particularly attractive in light of the ready accessibility of the starting material by cross-coupling reactions.…”

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confidence: 99%