SYNTHESIS AND CORRECTED STRUCTURES OF SULFUR-CONTAINING AMIDES FROM GLYCOSMIS SPECIES - SINHARINES, PENIMIDES, AND ILLUKUMBINS

The structures of sinharine and methylsinharine isolated from Glycosmis cyanocarpa, penimide A and penimide B from G. chlorosperma, and methylillukumbin A, illukumbin B and methylillukumbin B from G. mauritiana were revised on the basis of synthesis and additional spectroscopic evidence. The methylthio group and the aromatic moiety have to change their positions in the molecules. Thus the compounds represent amides of 3-(methylthio)-propenoic acid and not cinnamides as described previously.