Vana, Lubomir published the artcileSynthesis of Aza[n]helicenes (n = 4-7) via Photocyclodehydrochlorination of 1-Chloro-N-aryl-2-naphthamides, Quality Control of 86-48-6, the publication is Journal of Organic Chemistry (2022), 87(11), 7150-7166, database is CAplus and MEDLINE.
A series of 5-aza[4]helicene, e.g., I was synthesized using a photocyclodehydrochlorination of 1-chloro-N-aryl-2-naphthamides, e.g., 1-chloro-N-phenyl-2-naphthamide as a general synthetic procedure introducing the nitrogen atom to the third ring of the helicene framework. The effect of the nitrogen presence in the helicene skeleton on the physicochem. properties of the prepared 5-aza[4]helicene was studied and compared to those of the parent carbo-analogs. The insertion of a nitrogen atom into the outer edge of the helicene mol. has a severe impact on certain physicochem. properties such as optical rotation, electrostatic potentials, and intermol. interactions. On the other hand, some other properties such as UV/vis, fluorescence, and phosphorescence spectra remained almost unaffected when compared to the parent carbohelicenes. A nitrogen atom can be also used for further derivatization, which can lead to further modification of helicene properties, as manifested here in the fluorescence changes induced by protonation.
Journal of Organic Chemistry published new progress about 86-48-6. 86-48-6 belongs to alcohols-buliding-blocks, auxiliary class Organic Pigment,Natural product, name is 1-Hydroxy-2-naphthoic acid, and the molecular formula is C10H9ClN2O, Quality Control of 86-48-6.
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