EXPLORING CAGE CHIRALITY OF PHOSPHORUS SULFIDE AMIDES AND IMIDES

Chirality of bicyclic P4S3 skeletons has been explored by reaction of alpha- or beta-P4S3I2 with enantiomerically pure or racemic H2NCHMePh, to give diastereomers of products with one or two exocyclic amide sub stituents, or of cage structures containing a bridging imide group. P- 31 NMR spectra show diastereomeric differences in chemical shifts of a ll four phosphorus atoms in the product molecules. Comparison of obser ved with predicted numbers of diastereomers is a useful extra tool for identification of unseparated new compounds by NMR.