Both nitrogen and sulfur-containing compounds of this class can undergo the Stevens rearrangement.  
Both nitrogen and sulfur-containing compounds of this class can undergo the Stevens rearrangement.  The sulfur variety are formed as intermediates in DMSO oxidations such as the Pfitzner-Moffatt and Swern reactions.  Variants of the most widely used reaction involving these compounds include those using them as a lithium halide complex, and the Horner-Wadsworth-Emmons reaction, which uses a phosphonate.  They are more stable than their corresponding carbanion due to the field effect and they are generated from the corresponding halide using a strong base.  FTP, name these organic compounds whose phosphorus variety react with aldehydes and ketones in the Wittig reaction.
Both nitrogen and sulfur-containing compounds of this class can undergo the Stevens rearrangement.  
ylides