?Nichtcarbenoide? Zwischenstufen bei der Fragmentierung von ?-Cyclopropyltosylhydrazonen
作者:G. Ohloff、W. Pickenhagen
DOI:10.1002/hlca.19710540706
日期:1971.11.1
The sodium salts of the tricyclic tosylhydrazones 1, 4 and 5 yield by base-catalyzed fragmentation between 130–160° the monocyclic ring expansion products 2, 3 and 6. IR.-spectrometry suggests a diazoalkane A as the principal intermediate of the fragmentation. Besides the known carbene mechanism the reaction is considered to pass through a noncarbenoid intermediate.