Synthesis of the structures proposed for natural butanolides piliferolides A and C
作者:Jing Guan、Zhi-Bin Zhen、Yang Zou、Zheng-Yu Yue、Ping Jiang、Yan Li、Yikang Wu
DOI:10.1016/j.tet.2010.12.037
日期:2011.2
The structures proposed for natural butanolides piliferolides A and C have been synthesized. The allylic and lactone stereogenic centers in the target structures were derived from D-mannitol, while that near the side-chain terminal was taken from (R)-propylene oxide. The synthetic samples helped to reveal that a signal at around delta 2.0 ppm was missing in the H-1 NMR data listing for the structures proposed for natural piliferolides, whereas the delta 29.7 ppm signal in the C-13 NMR reported for the structure proposed for natural piliferolide C most likely stemmed from the impurities in the chromatography solvent. (C) 2011 Elsevier Ltd. All rights reserved.