Tetracyclic phenothiazines. III. . Intermolecular hydride transfer in acid induced disproportionation of 1,2-dihydro-3-hydroxy-3<i>H</i>-pyrido[3,2,1-<i>kl</i>] phenothiazines
作者:A. R. Martin、S. H. Kim、G. W. Peng、G. V. Siegel、T. J. Yale
DOI:10.1002/jhet.5570150817
日期:1978.12
1,2-Dihydro-3-hydroxy-3H-pyrido[3,2,1-kl]phenothiazines and 1H-pyrido[3,2,1-kl]phenothiazines undergo acid catalyzed disproportionation with intermolecular hydride transfer to form pyrido[3,2,1-kl]phenothiazinium salts and 1,2-dihydro-3H-pyrido[3,2,1-kl]phenothiazines. Sodium borohydride reduction of 3-alkyl- or 3-arylpyrido[3,2,1-kl]phenothiazinium salts gives 3-alkyl- or 3-aryl-1H-pyrido[3,2,1-kl]phenothiazines
1,2-二氢-3-羟基-3- ħ吡啶并[3,2,1- KL ]吩噻嗪和1个ħ吡啶并[3,2,1 -kl ]吩噻嗪经历与分子间氢化物转移到形式吡啶并酸催化歧化[3,2,1- kl ]吩噻嗪盐和1,2-二氢-3 H-吡啶基[3,2,1- kl ]吩噻嗪。硼氢化钠还原3-烷基-或3-芳基吡啶并[3,2,1- kl ]吩噻嗪鎓盐可得到3-烷基-或3-芳基-1 H-吡啶并[3,2,1- kl ]吩噻嗪。在质子源的存在下,硼氢化物还原吡啶并[3,2,1- kl ]吩噻嗪氟硼酸盐或3-氯吡啶基-[3,2,1-kl高氯酸盐吩噻嗪鎓盐生成1,2-二氢-3 H-吡啶并[3,2,1- kl ]吩噻嗪,而1 H-吡啶并[3,2,1- kl ]吩噻嗪在非质子溶剂中形成吡啶。