Total Synthesis and Structure Revision of Palmarumycin B6.
Xinlei LiuWeiwei WangYu ZhaoDaowan LaiLi-Gang ZhouZhilong LiuMingan WangPublished in: Journal of natural products (2018)
Palmarumycin B6 and its regioisomer were synthesized via 7- and 13-step routes using 2-chlorophenol and 4-chlorophenyl methyl ether as the starting materials in overall yields of 2.7% and 12%, respectively. Their structures were characterized by 1H and 13C NMR, HRESIMS, and X-ray diffraction data. The structure of palmarumycin B6 was revised as 6-chloropalmarumycin CP17. The bioassay results showed that the larvicidal activity of palmarumycin B6 with an LC50 value of 32.7 μM was significantly higher than that of its 8-chloro isomer, with an LC50 value of 227.3 μM.
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