Formation of 4-Halo-4-nitrocyclohexa-2,5-dienones on nitration of p-halophenols and p-halophenyl acetates
作者:Robin G. Clewley、Gordon G. Cross、Alfred Fischer、George N. Henderson
DOI:10.1016/0040-4020(89)80128-0
日期:1989.1
Nitration of p-chloro-, p-fluoro-, and p-bromo-phenol or the corresponding p-halophenyl acetates at t-40 °C and below gives the 4-halo-4-nitrocyclohexa-2, 5-dienones in addition to the 4-halo-2-nitrophenols. The dienones isomerize to the nitrophenols at temperatures between −40 °C and 0°C. Nitration of 4-chloro-2-methylphenol or its acetate gives both 4-chloro-2-methyl-4-nitrocyclohexa-2, 5-dienone