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We describe the synthesis of 4,4′-oxyneolignan, the proposed structure for naturally occurring apteniol D. The diphenyl ether moiety in 4,4′-oxyneolignan was formed via classical Ullmann ether synthesis using excess copper powder in N,N-dimethylacetamide. The spectral data of synthesised apteniol D show differences compared to those of naturally occurring apteniol D.
The authors would like to thank Enago (www.enago.jp) for the English language review.
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