X-Ray Structure of Two Naturally Occuring Cinnamylidene-butenolides
Open Access
- 1 April 1977
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung C
- Vol. 32 (3-4) , 290-291
- https://doi.org/10.1515/znc-1977-3-424
Abstract
X-Ray An X-ray analysis of two compounds isolated from Piper sanctum confirmed the trans configuration for 5-(methoxy) -cinnamyliden-4-methoxy-but-3-enolide (= piperolide [1]) and for 5-[trans-(2) -β-γ epoxy-α-methoxy-cinnamyliden]-4-methoxy-2 (5H) -furanon (= epoxypiperolide [2]). The stereochemistry of the semicyclic double bond is in favour of the Z-isomeres.Keywords
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