Syntheses oftrans- andcis-3-Methoxy-4-methylthio-2-piperidinethiones. Previously Proposed Structures for Raphanusanins, Structural Revision, and Biological Activities of Their Congeners
Syntheses oftrans- andcis-3-Methoxy-4-methylthio-2-piperidinethiones. Previously Proposed Structures for Raphanusanins, Structural Revision, and Biological Activities of Their Congeners
Trans- and cis-3-methoxy-4-methylthio-2-piperidinethiones previously proposed for raphanusanins as a light-induced growth inhibitor, have been synthesized starting from the known alpha,beta-unsaturated lactam. However, the spectral data of the synthetic compounds are incompatible with those of natural ones. Thus, reexamination of H-1 and C-13 NMR spectra of the natural samples has led to correct structures for raphanusanins. The synthetic compounds also show a growth inhibitory activity.
Syntheses of<i>trans</i>- and<i>cis</i>-3-Methoxy-4-methylthio-2-piperidinethiones. Previously Proposed Structures for Raphanusanins, Structural Revision, and Biological Activities of Their Congeners
Related to raphanusanins, light-induced growth inhibitors of radish seedlings, syntheses of trans- and cis-3-methoxy-4-methylthio-2-piperidinethiones provided the structural revision of the natural products. During syntheses of several piperidinethione derivatives, the dihydropyridinethione derivative was found to possess twentyfold stronger inhibitory activity than the natural products.