Condensations of N-arylhydroxylamines for the preparation of 5,5′-di-tert-butyl-2,2′-dihydroxydiphenylamine
作者:John D Spence、Ashley E Raymond、Dianne E Norton
DOI:10.1016/s0040-4039(02)02699-0
日期:2003.1
Acid-promoted condensation of 4-tert-butyl-2-hydroxylaminoanisole with p-tert-butylphenol resulted in the formation of 5,5′-di-tert-butyl-2,2′-dihydroxydiphenylamine upon demethylation with BBr3. Protection of the acidic phenol unit was required to isolate the acid labile N-arylhydroxylamine intermediate.
酸促进的缩合4-叔丁基-2- hydroxylaminoanisole与p -叔丁基苯酚导致5,5'-二-的形成叔丁基-2,2'-二dihydroxydiphenylamine在去甲基化与的BBr 3。需要酸性苯酚单元的保护以分离酸不稳定的N-芳基羟胺中间体。