N-Isobutyl-2E,4E,8Z-eicosatrienamide;Isobutylamid v. Eicosa-2.4.8-triensaeure;(2e,4e,8z)-N-isobutylicosa-2,4,8-trienamide;(2E,4E,8Z)-N-(2-methylpropyl)icosa-2,4,8-trienamide
Studies on the constituents of the crude drug "Piperis Longi Fructus." On the alkaloids of fruits of Piper longum L.
作者:WNANBYR TABUNENG、HIDEO BANDO、TAKASHI AMIYA
DOI:10.1248/cpb.31.3562
日期:——
Two new piperidine alkaloids, pipernonaline and piperundecalidine, were isolated from fruits of Piper longum L. (Piperaceae). Their structures were determined to be (2E, 8E)-N-[9-(3, 4-methylenedioxyphenyl)-2, 8-nonadienoyl]piperidine and (2E, 4E, 10E)-N-[11-(3, 4-methylenedioxyphenyl)-2, 4, 10-undecatrienoyl]piperidine, respectively, on the basis of spectral data.
Synthesis of natural polyene isobutylamides. Stereochemistry of the wittig reactions
作者:Leslie Crombie、David Fisher
DOI:10.1016/s0040-4039(00)94859-7
日期:1985.1
Unsaturated isobutylamide synthons are employed to make seven natural amides. The (Z)-selectivity of the Wittig reaction towards the newly formed olefinic bond in the seven examples is estimated by 13 Cmr.