Tetrahedron p. 2541 - 2546 (1984)
Update date:2022-08-04
Topics:
Okwute, S. K.
Okogun, J. I.
Okorie, D. A.
The structures of piperolein acids guineensine and wisanine have been confirmed by synthesis.UV irradiation of trans piperolein B acid ester gave the cis-isomer reported in the literature as the trans-isomer.The trans-2, trans-4 ethylenic bonds in guineensine and wisanine were introduced by reacting piperolein B aldehyde and 2-methoxy piperonal with the appropriate Wittig or Reformatsky reagent.
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