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A visible‐light‐promoteded [3 + 2] cycloaddition reaction of 2H‐azirines with quinones has been developed under mild reaction conditions. The reaction provides a general and efficient strategy for the synthesis of the benzo[f]isoindole‐4,9‐diones scaffold via a tandem [3 + 2] cyclization/oxidative aromatization with molecular oxygen. Furthermore, preliminary studies for photocatalytic properties show...
Four new N‐methoxyindolediketopiperazines (acrozines D—G, 1—4) and six known congeners (5—10) were purified from the organic extract of Acrostalagmus luteoalbus TK‐43, which was a marine algal‐derived fungus obtained from Codium fragile. Their structures were determined by interpretation of NMR and mass spectroscopic data. The structures of compounds 1, 2, and 4 including their absolute configurations...