作者:Antonio Guirado、Alfredo Cerezo、M.Carmen Ramírez de Arellano
DOI:10.1016/s0040-4020(97)00275-5
日期:1997.4
An efficient, generally applicable one-pot method for the synthesis of 1,4-dichlorophenazines has been established. The method is based on the use of 3,3,6,6-tetrachloro-1,2-cyclohexanedione 2 as a synthetic equivalent of 3,6-dichloro-1,2-benzoquinone 1. The reaction of 2 with primary 1,2-arylidenediamines followed by treatment with pyridine provides the title compounds in nearly quantitative yields. 1,1,4,4-Tetrachloro-1,2,3,4-tetrahydrophenazines are isolable intermediates. The crystallographic X-ray structure of 7,7'-Bis(1,1,4,4-tetrachloro-1,2,3,4-tetrahydrophenazine) 7 has been determined. (C) 1997 Elsevier Science Ltd.