Improved preparations of some arenesulfonylhydrazones
作者:Steven H. Bertz、Gary Dabbagh
DOI:10.1021/jo00149a022
日期:1983.1
Investigations on Superbase Mediated Reactivity of N‐Tosylhydrazones with Aza‐ortho‐Quinone Methide Precursors
作者:Rahul P.、Arunkumar T. K.、Seena Sebastian、Haritha Raveendran、Sunil Varughese、Jomon Mathew、Jubi John
DOI:10.1002/ejoc.202400151
日期:2024.5.13
We have encountered a superbase‐mediated chemoselective reaction of N‐tosylhydrazones with aza‐ortho‐quinone methide precursors. When tosylhydrazone was treated with ortho‐aminobenzyl alcohol in super basic conditions (KOH+DMSO), we observed the formation of 2‐substituted quinoline. The reaction was found to be general, and by this method, mono‐, di‐ and tri‐substituted quinolines could be made. We could prove experimentally and theoretically that the reaction proceeded via the formation of an azine from the basic decomposition of N‐tosylhydrazones. Finally, the reaction of tosylhydrazone with N‐(2‐(chloromethyl)phenyl)‐4‐methylbenzenesulfonamide (aza‐ortho‐quinone methide precursor) under super basic conditions afforded hydrazine substituted sulfonamides.