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Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
Published on: July 17, 2020
Salicylaldehyde derivatives from a marine-derived fungus Eurotium sp. SCSIO F452
Weimao Zhong1,2, Yuchan Chen3, Xiaoyi Wei4
1CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangdong Key Laboratory of Marine Materia Medica, RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, 510301, Guangzhou, China.
Abstract:
Two pairs of new salicylaldehyde derivative enantiomers, salicylaldehydiums A and B (1 and 2), along with five known analogues were isolated and identified from a marine-derived fungus Eurotium sp. SCSIO F452. Their structures and absolute configuration were determined by extensive spectroscopic analysis and electronic circular dichroism (ECD) calculations. All the new optical pure enantiomers [(+)-1, (-)-1, (+)-2, (-)-2] were evaluated for their cytotoxic and antioxidative activities. Compound (-)-1 exhibited weak cytotoxic activity.
