IR band at 2100 f 10 cm-'and 13C peaks for the carbon bearing azide and the S-CH3 carbon at 6 71.7-80.8 and 10.2-12.6, respectively. While the azides appeared to be reasonably stable and were purified by normal chromatographic procedures, the pure azides were normally not stored for long times. Addition of 4 equiv of trifluoroacetic acid to a chloroform solution of the a-azido sulfide led to a rapid and virtually quantitative rearrangement ...
