Organic Letters 2014-01-03

Selaginpulvilins A-D, new phosphodiesterase-4 inhibitors with an unprecedented skeleton from Selaginella pulvinata.

Xin Liu, Hai-Bin Luo, Yi-You Huang, Jing-Mei Bao, Gui-Hua Tang, Yun-Yun Chen, Jun Wang, Sheng Yin

Index: Org. Lett. 16(1) , 282-5, (2014)

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Abstract

Selaginpulvilins A-D (1-4), four new phenols with an unprecedented 9,9-diphenyl-1-(phenylethynyl)-9H-fluorene skeleton, together with four known selaginellins (5-8) were isolated from Selaginella pulvinata. Their structures were elucidated by spectroscopic analysis and chemical correlation. The structure of 1 was confirmed by single-crystal X-ray diffraction. Compounds 1-8 exhibited remarkable inhibitory activities (IC50 values in the range of 0.11-5.13 μM) against phosphodiesterase-4 (PDE4), a drug target for the treatment of asthma and chronic obstructive pulmonary disease.

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