An established route to the bacteriochlorophyll skeleton from two dihydrodipyrrin halves has been extended to accommodate several substituents characteristic of the native bacteriochlorophyll a.
Two simple pyrroles react in two simple reactions to afford a dipyrromethane analogue of the southern rim of native tetrapyrroles and their catabolites.
Nitroarenes are versatile intermediate, thus found ubiquitous uses in synthesis of bio-related molecules and functional materials. Herein we develop methods for synthesis of substituted nitroarenes benefited from oxidative nucleophilic amination of CÀ H bonds para to the nitro functionality. Simple base NaOH was used to mediate the coupling of NÀ H heterocycles and nitrobenzene. Meanwhile, 5-nitro-1-aryl-1H-indazoles were isolated from copper-mediated annulation of 3nitroaryl methyl ketones and arylhydrazines.
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