THE SMILES REARRANGEMENT OF 4-NITROPHENYL<i>N</i>-HYDROXYCARBAMATE: THE INVOLVEMENT OF A SPIRO MEISENHEIMER COMPLEX OF AMONONITROBENZENE DERIVATIVE AS A TRANSIENT REACTION INTERMEDIATE
作者:Leonard R. Fitzgerald、Robert L. Blakeley、Burt Zerner
DOI:10.1246/cl.1984.29
日期:1984.1.5
In alkaline solution, 4-nitrophenyl N-hydroxycarbamate undergoes reaction by elimination to yield 4-nitrophenoxide ion, and by rearrangement to yield N-carboxy-4-nitrophenoxyamine. The effect of pH on the yield of the rearrangement product establishes that a transient spiro Meisenheimer complex is formed reversibly. Aromatization of this species occurs by two competing pH-independent reactions: one