sulfur is demonstrated, which allows access to various phenothiazines with the merits of formation of multiple chemical bonds in one single operation, high step and atom efficiency, readily available feedstocks and catalyst system, and good substrate and functional group compatibility. The developed chemistry capable of constructing novel phenothiazines with structural diversity offers a significant basis
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 intermolecularhydridetransfer 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