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Published in 2022 at "Molecules"
DOI: 10.3390/molecules27041272
Abstract: The triflic-acid-promoted cyclization of 1-phenyl-3-(pyren-1-yl)-1H-pyrazole-4-carbaldehyde afforded a mixture of 9-phenyl-7,9-dihydropyreno (10,1-fg)indazole and 9-phenylpyreno(10,1-fg)indazole-7(9H)-one, readily separable by column chromatography. Both products contained a rigid six-ringed pyrazoolympicene backbone and exhibited bright fluorescence in chloroform solution and a…
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Keywords:
fluorescent dyes;
highly fluorescent;
conformationally restrained;
containing conformationally ... See more keywords