Hydroxide-promoted redox reactions in water of α-Phenyl-4-nitro-benzenemethanol, α-(<i>p</i>-Nitrophenyl)-4-pyridinemethanol, and α-(<i>p</i>-Nitrophenyl)-4-Pyridinemethanol<i>N</i>-Oxide steric inhibition of resonance
作者:Chester W. Muth、Kaipeen E. Yang
DOI:10.1002/jhet.5570330206
日期:1996.3
amounts of 4-aminobenzophenone and 4-nitrobenzophenone. Both α-phenyl-2-nitrobenzenemethanol (9) and 3, 5-dimethyl-4-nitrobenzenemethanol (10a) did not react with 1 M sodium hydroxide, presumably due to steric hindrance. α-(p-Nitrophenyl)-4-pyridinemethanol (14) and its N-oxide 11 with 1 M sodium hydroxide yielded 4,4′-diaroylazoxybenzenes 15a and 12a, respectively, 4,4′-diaroylazobenzenes 15b and 12b, respectively
α-苯基-4-硝基苯甲醇(3)与1 M氢氧化钠反应生成4,4,4'-二苯甲酰基-偶氮苯(5)(51%),4-羟基-4'-苯甲酰基偶氮苯(6)和苯甲酸(12) %)和少量的4-氨基二苯甲酮和4-硝基二苯甲酮。推测由于空间位阻,α-苯基-2-硝基苯甲醇(9)和3,5-二甲基-4-硝基苯甲醇(10a)均未与1M氢氧化钠反应。α-(对硝基苯基)-4-吡啶甲醇(14)及其1 M的N-氧化物11氢氧化钠分别产生4,4'-二酰氨基偶氮苯15a和12a,4,4'-二酰氨基偶氮苯15b和12b,以及4-羟基-4'-芳酰偶氮苯16和13。相对反应速率为11> 14> 3。对11的研究表明,硝基比N-氧化物优先参与氧化还原反应。